diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/AnnotationVisitor.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/AnnotationVisitor.java
index 0654582..3dd95b3 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/AnnotationVisitor.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/AnnotationVisitor.java
@@ -85,6 +85,17 @@
   }
 
   /**
+   * The annotation visitor to which this visitor must delegate method calls. May be {@literal
+   * null}.
+   *
+   * @return the annotation visitor to which this visitor must delegate method calls, or {@literal
+   *     null}.
+   */
+  public AnnotationVisitor getDelegate() {
+    return av;
+  }
+
+  /**
    * Visits a primitive value of the annotation.
    *
    * @param name the value name.
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Attribute.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Attribute.java
index bd090e6..f63fc71 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Attribute.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Attribute.java
@@ -28,7 +28,7 @@
 package jersey.repackaged.org.objectweb.asm;
 
 /**
- * A non standard class, field, method or code attribute, as defined in the Java Virtual Machine
+ * A non standard class, field, method or Code attribute, as defined in the Java Virtual Machine
  * Specification (JVMS).
  *
  * @see <a href= "https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7">JVMS
@@ -52,7 +52,7 @@
 
   /**
    * The next attribute in this attribute list (Attribute instances can be linked via this field to
-   * store a list of class, field, method or code attributes). May be {@literal null}.
+   * store a list of class, field, method or Code attributes). May be {@literal null}.
    */
   Attribute nextAttribute;
 
@@ -80,9 +80,9 @@
   }
 
   /**
-   * Returns {@literal true} if this type of attribute is a code attribute.
+   * Returns {@literal true} if this type of attribute is a Code attribute.
    *
-   * @return {@literal true} if this type of attribute is a code attribute.
+   * @return {@literal true} if this type of attribute is a Code attribute.
    */
   public boolean isCodeAttribute() {
     return false;
@@ -92,7 +92,7 @@
    * Returns the labels corresponding to this attribute.
    *
    * @return the labels corresponding to this attribute, or {@literal null} if this attribute is not
-   *     a code attribute that contains labels.
+   *     a Code attribute that contains labels.
    */
   protected Label[] getLabels() {
     return new Label[0];
@@ -111,11 +111,11 @@
    * @param charBuffer the buffer to be used to call the ClassReader methods requiring a
    *     'charBuffer' parameter.
    * @param codeAttributeOffset index of the first byte of content of the enclosing Code attribute
-   *     in {@link ClassReader}, or -1 if the attribute to be read is not a code attribute. The 6
+   *     in {@link ClassReader}, or -1 if the attribute to be read is not a Code attribute. The 6
    *     attribute header bytes (attribute_name_index and attribute_length) are not taken into
    *     account here.
    * @param labels the labels of the method's code, or {@literal null} if the attribute to be read
-   *     is not a code attribute.
+   *     is not a Code attribute.
    * @return a <i>new</i> {@link Attribute} object corresponding to the specified bytes.
    */
   protected Attribute read(
@@ -138,16 +138,16 @@
    *
    * @param classWriter the class to which this attribute must be added. This parameter can be used
    *     to add the items that corresponds to this attribute to the constant pool of this class.
-   * @param code the bytecode of the method corresponding to this code attribute, or {@literal null}
-   *     if this attribute is not a code attribute. Corresponds to the 'code' field of the Code
+   * @param code the bytecode of the method corresponding to this Code attribute, or {@literal null}
+   *     if this attribute is not a Code attribute. Corresponds to the 'code' field of the Code
    *     attribute.
    * @param codeLength the length of the bytecode of the method corresponding to this code
-   *     attribute, or 0 if this attribute is not a code attribute. Corresponds to the 'code_length'
+   *     attribute, or 0 if this attribute is not a Code attribute. Corresponds to the 'code_length'
    *     field of the Code attribute.
-   * @param maxStack the maximum stack size of the method corresponding to this code attribute, or
-   *     -1 if this attribute is not a code attribute.
+   * @param maxStack the maximum stack size of the method corresponding to this Code attribute, or
+   *     -1 if this attribute is not a Code attribute.
    * @param maxLocals the maximum number of local variables of the method corresponding to this code
-   *     attribute, or -1 if this attribute is not a code attribute.
+   *     attribute, or -1 if this attribute is not a Code attribute.
    * @return the byte array form of this attribute.
    */
   protected ByteVector write(
@@ -197,16 +197,16 @@
    * attribute_length) per attribute. Also adds the attribute type names to the constant pool.
    *
    * @param symbolTable where the constants used in the attributes must be stored.
-   * @param code the bytecode of the method corresponding to these code attributes, or {@literal
-   *     null} if they are not code attributes. Corresponds to the 'code' field of the Code
+   * @param code the bytecode of the method corresponding to these Code attributes, or {@literal
+   *     null} if they are not Code attributes. Corresponds to the 'code' field of the Code
    *     attribute.
    * @param codeLength the length of the bytecode of the method corresponding to these code
-   *     attributes, or 0 if they are not code attributes. Corresponds to the 'code_length' field of
+   *     attributes, or 0 if they are not Code attributes. Corresponds to the 'code_length' field of
    *     the Code attribute.
-   * @param maxStack the maximum stack size of the method corresponding to these code attributes, or
-   *     -1 if they are not code attributes.
+   * @param maxStack the maximum stack size of the method corresponding to these Code attributes, or
+   *     -1 if they are not Code attributes.
    * @param maxLocals the maximum number of local variables of the method corresponding to these
-   *     code attributes, or -1 if they are not code attribute.
+   *     Code attributes, or -1 if they are not Code attribute.
    * @return the size of all the attributes in this attribute list. This size includes the size of
    *     the attribute headers.
    */
@@ -285,16 +285,16 @@
    * attribute.
    *
    * @param symbolTable where the constants used in the attributes must be stored.
-   * @param code the bytecode of the method corresponding to these code attributes, or {@literal
-   *     null} if they are not code attributes. Corresponds to the 'code' field of the Code
+   * @param code the bytecode of the method corresponding to these Code attributes, or {@literal
+   *     null} if they are not Code attributes. Corresponds to the 'code' field of the Code
    *     attribute.
    * @param codeLength the length of the bytecode of the method corresponding to these code
-   *     attributes, or 0 if they are not code attributes. Corresponds to the 'code_length' field of
+   *     attributes, or 0 if they are not Code attributes. Corresponds to the 'code_length' field of
    *     the Code attribute.
-   * @param maxStack the maximum stack size of the method corresponding to these code attributes, or
-   *     -1 if they are not code attributes.
+   * @param maxStack the maximum stack size of the method corresponding to these Code attributes, or
+   *     -1 if they are not Code attributes.
    * @param maxLocals the maximum number of local variables of the method corresponding to these
-   *     code attributes, or -1 if they are not code attribute.
+   *     Code attributes, or -1 if they are not Code attribute.
    * @param output where the attributes must be written.
    */
   final void putAttributes(
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassReader.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassReader.java
index cd4a6bb..d6e90a7 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassReader.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassReader.java
@@ -194,7 +194,7 @@
     this.b = classFileBuffer;
     // Check the class' major_version. This field is after the magic and minor_version fields, which
     // use 4 and 2 bytes respectively.
-    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V19) {
+    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V20) {
       throw new IllegalArgumentException(
           "Unsupported class file major version " + readShort(classFileOffset + 6));
     }
@@ -375,7 +375,7 @@
   }
 
   /**
-   * Returns the internal of name of the super class (see {@link Type#getInternalName()}). For
+   * Returns the internal name of the super class (see {@link Type#getInternalName()}). For
    * interfaces, the super class is {@link Object}.
    *
    * @return the internal name of the super class, or {@literal null} for {@link Object} class.
@@ -859,7 +859,7 @@
       currentOffset += 2;
     }
 
-    // Read the  'provides_count' and 'provides' fields.
+    // Read the 'provides_count' and 'provides' fields.
     int providesCount = readUnsignedShort(currentOffset);
     currentOffset += 2;
     while (providesCount-- > 0) {
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassTooLargeException.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassTooLargeException.java
index 8b46201..fefcfe7 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassTooLargeException.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassTooLargeException.java
@@ -42,7 +42,8 @@
   /**
    * Constructs a new {@link ClassTooLargeException}.
    *
-   * @param className the internal name of the class.
+   * @param className the internal name of the class (see {@link
+   *     jersey.repackaged.org.objectweb.asm.Type#getInternalName()}).
    * @param constantPoolCount the number of constant pool items of the class.
    */
   public ClassTooLargeException(final String className, final int constantPoolCount) {
@@ -52,7 +53,7 @@
   }
 
   /**
-   * Returns the internal name of the class.
+   * Returns the internal name of the class (see {@link jersey.repackaged.org.objectweb.asm.Type#getInternalName()}).
    *
    * @return the internal name of the class.
    */
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassVisitor.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassVisitor.java
index 8ebf594f..44c6535 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassVisitor.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassVisitor.java
@@ -67,7 +67,7 @@
    *     null.
    */
   protected ClassVisitor(final int api, final ClassVisitor classVisitor) {
-   if (api != Opcodes.ASM9
+    if (api != Opcodes.ASM9
         && api != Opcodes.ASM8
         && api != Opcodes.ASM7
         && api != Opcodes.ASM6
@@ -84,6 +84,15 @@
   }
 
   /**
+   * The class visitor to which this visitor must delegate method calls. May be {@literal null}.
+   *
+   * @return the class visitor to which this visitor must delegate method calls, or {@literal null}.
+   */
+  public ClassVisitor getDelegate() {
+    return cv;
+  }
+
+  /**
    * Visits the header of the class.
    *
    * @param version the class version. The minor version is stored in the 16 most significant bits,
@@ -157,7 +166,8 @@
    * implicitly its own nest, so it's invalid to call this method with the visited class name as
    * argument.
    *
-   * @param nestHost the internal name of the host class of the nest.
+   * @param nestHost the internal name of the host class of the nest (see {@link
+   *     Type#getInternalName()}).
    */
   public void visitNestHost(final String nestHost) {
     if (api < Opcodes.ASM7) {
@@ -169,14 +179,19 @@
   }
 
   /**
-   * Visits the enclosing class of the class. This method must be called only if the class has an
-   * enclosing class.
+   * Visits the enclosing class of the class. This method must be called only if this class is a
+   * local or anonymous class. See the JVMS 4.7.7 section for more details.
    *
-   * @param owner internal name of the enclosing class of the class.
+   * @param owner internal name of the enclosing class of the class (see {@link
+   *     Type#getInternalName()}).
    * @param name the name of the method that contains the class, or {@literal null} if the class is
-   *     not enclosed in a method of its enclosing class.
+   *     not enclosed in a method or constructor of its enclosing class (e.g. if it is enclosed in
+   *     an instance initializer, static initializer, instance variable initializer, or class
+   *     variable initializer).
    * @param descriptor the descriptor of the method that contains the class, or {@literal null} if
-   *     the class is not enclosed in a method of its enclosing class.
+   *     the class is not enclosed in a method or constructor of its enclosing class (e.g. if it is
+   *     enclosed in an instance initializer, static initializer, instance variable initializer, or
+   *     class variable initializer).
    */
   public void visitOuterClass(final String owner, final String name, final String descriptor) {
     if (cv != null) {
@@ -243,7 +258,7 @@
    * the visited class is the host of a nest. A nest host is implicitly a member of its own nest, so
    * it's invalid to call this method with the visited class name as argument.
    *
-   * @param nestMember the internal name of a nest member.
+   * @param nestMember the internal name of a nest member (see {@link Type#getInternalName()}).
    */
   public void visitNestMember(final String nestMember) {
     if (api < Opcodes.ASM7) {
@@ -258,7 +273,8 @@
    * Visits a permitted subclasses. A permitted subclass is one of the allowed subclasses of the
    * current class.
    *
-   * @param permittedSubclass the internal name of a permitted subclass.
+   * @param permittedSubclass the internal name of a permitted subclass (see {@link
+   *     Type#getInternalName()}).
    */
   public void visitPermittedSubclass(final String permittedSubclass) {
     if (api < Opcodes.ASM9) {
@@ -271,15 +287,18 @@
 
   /**
    * Visits information about an inner class. This inner class is not necessarily a member of the
-   * class being visited.
+   * class being visited. More precisely, every class or interface C which is referenced by this
+   * class and which is not a package member must be visited with this method. This class must
+   * reference its nested class or interface members, and its enclosing class, if any. See the JVMS
+   * 4.7.6 section for more details.
    *
-   * @param name the internal name of an inner class (see {@link Type#getInternalName()}).
-   * @param outerName the internal name of the class to which the inner class belongs (see {@link
-   *     Type#getInternalName()}). May be {@literal null} for not member classes.
-   * @param innerName the (simple) name of the inner class inside its enclosing class. May be
-   *     {@literal null} for anonymous inner classes.
-   * @param access the access flags of the inner class as originally declared in the enclosing
-   *     class.
+   * @param name the internal name of C (see {@link Type#getInternalName()}).
+   * @param outerName the internal name of the class or interface C is a member of (see {@link
+   *     Type#getInternalName()}). Must be {@literal null} if C is not the member of a class or
+   *     interface (e.g. for local or anonymous classes).
+   * @param innerName the (simple) name of C. Must be {@literal null} for anonymous inner classes.
+   * @param access the access flags of C originally declared in the source code from which this
+   *     class was compiled.
    */
   public void visitInnerClass(
       final String name, final String outerName, final String innerName, final int access) {
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassWriter.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassWriter.java
index de2c441..7bb6ab0 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassWriter.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ClassWriter.java
@@ -842,7 +842,7 @@
    * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
    * sub classes, and is normally not needed by class generators or adapters.</i>
    *
-   * @param value the internal name of the class.
+   * @param value the internal name of the class (see {@link Type#getInternalName()}).
    * @return the index of a new or already existing class reference item.
    */
   public int newClass(final String value) {
@@ -894,7 +894,8 @@
    *     Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link
    *     Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL},
    *     {@link Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
-   * @param owner the internal name of the field or method owner class.
+   * @param owner the internal name of the field or method owner class (see {@link
+   *     Type#getInternalName()}).
    * @param name the name of the field or method.
    * @param descriptor the descriptor of the field or method.
    * @return the index of a new or already existing method type reference item.
@@ -916,7 +917,8 @@
    *     Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link
    *     Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL},
    *     {@link Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
-   * @param owner the internal name of the field or method owner class.
+   * @param owner the internal name of the field or method owner class (see {@link
+   *     Type#getInternalName()}).
    * @param name the name of the field or method.
    * @param descriptor the descriptor of the field or method.
    * @param isInterface true if the owner is an interface.
@@ -978,7 +980,7 @@
    * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
    * sub classes, and is normally not needed by class generators or adapters.</i>
    *
-   * @param owner the internal name of the field's owner class.
+   * @param owner the internal name of the field's owner class (see {@link Type#getInternalName()}).
    * @param name the field's name.
    * @param descriptor the field's descriptor.
    * @return the index of a new or already existing field reference item.
@@ -992,7 +994,8 @@
    * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
    * sub classes, and is normally not needed by class generators or adapters.</i>
    *
-   * @param owner the internal name of the method's owner class.
+   * @param owner the internal name of the method's owner class (see {@link
+   *     Type#getInternalName()}).
    * @param name the method's name.
    * @param descriptor the method's descriptor.
    * @param isInterface {@literal true} if {@code owner} is an interface.
@@ -1028,9 +1031,10 @@
    * currently being generated by this ClassWriter, which can of course not be loaded since it is
    * under construction.
    *
-   * @param type1 the internal name of a class.
-   * @param type2 the internal name of another class.
-   * @return the internal name of the common super class of the two given classes.
+   * @param type1 the internal name of a class (see {@link Type#getInternalName()}).
+   * @param type2 the internal name of another class (see {@link Type#getInternalName()}).
+   * @return the internal name of the common super class of the two given classes (see {@link
+   *     Type#getInternalName()}).
    */
   protected String getCommonSuperClass(final String type1, final String type2) {
     ClassLoader classLoader = getClassLoader();
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Constants.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Constants.java
index 629d52f..9e7b98c 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Constants.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Constants.java
@@ -26,6 +26,7 @@
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 // THE POSSIBILITY OF SUCH DAMAGE.
 package jersey.repackaged.org.objectweb.asm;
+
 import java.io.DataInputStream;
 import java.io.IOException;
 import java.io.InputStream;
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/FieldVisitor.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/FieldVisitor.java
index 64865d6..a75ad5f 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/FieldVisitor.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/FieldVisitor.java
@@ -81,6 +81,15 @@
   }
 
   /**
+   * The field visitor to which this visitor must delegate method calls. May be {@literal null}.
+   *
+   * @return the field visitor to which this visitor must delegate method calls, or {@literal null}.
+   */
+  public FieldVisitor getDelegate() {
+    return fv;
+  }
+
+  /**
    * Visits an annotation of the field.
    *
    * @param descriptor the class descriptor of the annotation class.
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Handle.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Handle.java
index 69188e0..60aeb0f 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Handle.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Handle.java
@@ -65,7 +65,7 @@
    *     {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
    *     Opcodes#H_INVOKEINTERFACE}.
    * @param owner the internal name of the class that owns the field or method designated by this
-   *     handle.
+   *     handle (see {@link Type#getInternalName()}).
    * @param name the name of the field or method designated by this handle.
    * @param descriptor the descriptor of the field or method designated by this handle.
    * @deprecated this constructor has been superseded by {@link #Handle(int, String, String, String,
@@ -85,7 +85,7 @@
    *     {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
    *     Opcodes#H_INVOKEINTERFACE}.
    * @param owner the internal name of the class that owns the field or method designated by this
-   *     handle.
+   *     handle (see {@link Type#getInternalName()}).
    * @param name the name of the field or method designated by this handle.
    * @param descriptor the descriptor of the field or method designated by this handle.
    * @param isInterface whether the owner is an interface or not.
@@ -118,7 +118,8 @@
   /**
    * Returns the internal name of the class that owns the field or method designated by this handle.
    *
-   * @return the internal name of the class that owns the field or method designated by this handle.
+   * @return the internal name of the class that owns the field or method designated by this handle
+   *     (see {@link Type#getInternalName()}).
    */
   public String getOwner() {
     return owner;
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/MethodTooLargeException.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/MethodTooLargeException.java
index 5ce29f4..303579b 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/MethodTooLargeException.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/MethodTooLargeException.java
@@ -44,7 +44,7 @@
   /**
    * Constructs a new {@link MethodTooLargeException}.
    *
-   * @param className the internal name of the owner class.
+   * @param className the internal name of the owner class (see {@link Type#getInternalName()}).
    * @param methodName the name of the method.
    * @param descriptor the descriptor of the method.
    * @param codeSize the size of the method's Code attribute, in bytes.
@@ -64,7 +64,7 @@
   /**
    * Returns the internal name of the owner class.
    *
-   * @return the internal name of the owner class.
+   * @return the internal name of the owner class (see {@link Type#getInternalName()}).
    */
   public String getClassName() {
     return className;
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/MethodVisitor.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/MethodVisitor.java
index 805aed5..269b034 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/MethodVisitor.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/MethodVisitor.java
@@ -96,6 +96,16 @@
     this.mv = methodVisitor;
   }
 
+  /**
+   * The method visitor to which this visitor must delegate method calls. May be {@literal null}.
+   *
+   * @return the method visitor to which this visitor must delegate method calls, or {@literal
+   *     null}.
+   */
+  public MethodVisitor getDelegate() {
+    return mv;
+  }
+
   // -----------------------------------------------------------------------------------------------
   // Parameters, annotations and non standard attributes
   // -----------------------------------------------------------------------------------------------
@@ -122,7 +132,7 @@
    * @return a visitor to the visit the actual default value of this annotation interface method, or
    *     {@literal null} if this visitor is not interested in visiting this default value. The
    *     'name' parameters passed to the methods of this annotation visitor are ignored. Moreover,
-   *     exacly one visit method must be called on this annotation visitor, followed by visitEnd.
+   *     exactly one visit method must be called on this annotation visitor, followed by visitEnd.
    */
   public AnnotationVisitor visitAnnotationDefault() {
     if (mv != null) {
@@ -275,15 +285,17 @@
    * @param type the type of this stack map frame. Must be {@link Opcodes#F_NEW} for expanded
    *     frames, or {@link Opcodes#F_FULL}, {@link Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link
    *     Opcodes#F_SAME} or {@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for compressed frames.
-   * @param numLocal the number of local variables in the visited frame.
+   * @param numLocal the number of local variables in the visited frame. Long and double values
+   *     count for one variable.
    * @param local the local variable types in this frame. This array must not be modified. Primitive
    *     types are represented by {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link
    *     Opcodes#FLOAT}, {@link Opcodes#LONG}, {@link Opcodes#DOUBLE}, {@link Opcodes#NULL} or
    *     {@link Opcodes#UNINITIALIZED_THIS} (long and double are represented by a single element).
-   *     Reference types are represented by String objects (representing internal names), and
-   *     uninitialized types by Label objects (this label designates the NEW instruction that
-   *     created this uninitialized value).
-   * @param numStack the number of operand stack elements in the visited frame.
+   *     Reference types are represented by String objects (representing internal names, see {@link
+   *     Type#getInternalName()}), and uninitialized types by Label objects (this label designates
+   *     the NEW instruction that created this uninitialized value).
+   * @param numStack the number of operand stack elements in the visited frame. Long and double
+   *     values count for one stack element.
    * @param stack the operand stack types in this frame. This array must not be modified. Its
    *     content has the same format as the "local" array.
    * @throws IllegalStateException if a frame is visited just after another one, without any
@@ -362,7 +374,7 @@
 
   /**
    * Visits a type instruction. A type instruction is an instruction that takes the internal name of
-   * a class as parameter.
+   * a class as parameter (see {@link Type#getInternalName()}).
    *
    * @param opcode the opcode of the type instruction to be visited. This opcode is either NEW,
    *     ANEWARRAY, CHECKCAST or INSTANCEOF.
@@ -645,8 +657,9 @@
    * @param start the beginning of the exception handler's scope (inclusive).
    * @param end the end of the exception handler's scope (exclusive).
    * @param handler the beginning of the exception handler's code.
-   * @param type the internal name of the type of exceptions handled by the handler, or {@literal
-   *     null} to catch any exceptions (for "finally" blocks).
+   * @param type the internal name of the type of exceptions handled by the handler (see {@link
+   *     Type#getInternalName()}), or {@literal null} to catch any exceptions (for "finally"
+   *     blocks).
    * @throws IllegalArgumentException if one of the labels has already been visited by this visitor
    *     (by the {@link #visitLabel} method).
    */
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ModuleVisitor.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ModuleVisitor.java
index 9667590..aba0283 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ModuleVisitor.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/ModuleVisitor.java
@@ -83,9 +83,20 @@
   }
 
   /**
+   * The module visitor to which this visitor must delegate method calls. May be {@literal null}.
+   *
+   * @return the module visitor to which this visitor must delegate method calls, or {@literal
+   *     null}.
+   */
+  public ModuleVisitor getDelegate() {
+    return mv;
+  }
+
+  /**
    * Visit the main class of the current module.
    *
-   * @param mainClass the internal name of the main class of the current module.
+   * @param mainClass the internal name of the main class of the current module (see {@link
+   *     Type#getInternalName()}).
    */
   public void visitMainClass(final String mainClass) {
     if (mv != null) {
@@ -96,7 +107,7 @@
   /**
    * Visit a package of the current module.
    *
-   * @param packaze the internal name of a package.
+   * @param packaze the internal name of a package (see {@link Type#getInternalName()}).
    */
   public void visitPackage(final String packaze) {
     if (mv != null) {
@@ -121,7 +132,7 @@
   /**
    * Visit an exported package of the current module.
    *
-   * @param packaze the internal name of the exported package.
+   * @param packaze the internal name of the exported package (see {@link Type#getInternalName()}).
    * @param access the access flag of the exported package, valid values are among {@code
    *     ACC_SYNTHETIC} and {@code ACC_MANDATED}.
    * @param modules the fully qualified names (using dots) of the modules that can access the public
@@ -136,7 +147,7 @@
   /**
    * Visit an open package of the current module.
    *
-   * @param packaze the internal name of the opened package.
+   * @param packaze the internal name of the opened package (see {@link Type#getInternalName()}).
    * @param access the access flag of the opened package, valid values are among {@code
    *     ACC_SYNTHETIC} and {@code ACC_MANDATED}.
    * @param modules the fully qualified names (using dots) of the modules that can use deep
@@ -152,7 +163,7 @@
    * Visit a service used by the current module. The name must be the internal name of an interface
    * or a class.
    *
-   * @param service the internal name of the service.
+   * @param service the internal name of the service (see {@link Type#getInternalName()}).
    */
   public void visitUse(final String service) {
     if (mv != null) {
@@ -163,9 +174,9 @@
   /**
    * Visit an implementation of a service.
    *
-   * @param service the internal name of the service.
-   * @param providers the internal names of the implementations of the service (there is at least
-   *     one provider).
+   * @param service the internal name of the service (see {@link Type#getInternalName()}).
+   * @param providers the internal names (see {@link Type#getInternalName()}) of the implementations
+   *     of the service (there is at least one provider).
    */
   public void visitProvide(final String service, final String... providers) {
     if (mv != null) {
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Opcodes.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Opcodes.java
index 0a591ec..63963b0 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Opcodes.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Opcodes.java
@@ -285,6 +285,7 @@
   int V17 = 0 << 16 | 61;
   int V18 = 0 << 16 | 62;
   int V19 = 0 << 16 | 63;
+  int V20 = 0 << 16 | 64;
 
   /**
    * Version flag indicating that the class is using 'preview' features.
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/RecordComponentVisitor.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/RecordComponentVisitor.java
index 65cf92c..e753339 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/RecordComponentVisitor.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/RecordComponentVisitor.java
@@ -45,7 +45,7 @@
   /**
    * The record visitor to which this visitor must delegate method calls. May be {@literal null}.
    */
-  /*package-private*/ RecordComponentVisitor delegate;
+  protected RecordComponentVisitor delegate;
 
   /**
    * Constructs a new {@link RecordComponentVisitor}.
@@ -85,7 +85,8 @@
   /**
    * The record visitor to which this visitor must delegate method calls. May be {@literal null}.
    *
-   * @return the record visitor to which this visitor must delegate method calls or {@literal null}.
+   * @return the record visitor to which this visitor must delegate method calls, or {@literal
+   *     null}.
    */
   public RecordComponentVisitor getDelegate() {
     return delegate;
diff --git a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Type.java b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Type.java
index ab8687e..6808aba 100644
--- a/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Type.java
+++ b/core-server/src/main/java/jersey/repackaged/org/objectweb/asm/Type.java
@@ -245,7 +245,7 @@
   /**
    * Returns the {@link Type} corresponding to the given internal name.
    *
-   * @param internalName an internal name.
+   * @param internalName an internal name (see {@link Type#getInternalName()}).
    * @return the {@link Type} corresponding to the given internal name.
    */
   public static Type getObjectType(final String internalName) {
diff --git a/core-server/src/main/java/org/glassfish/jersey/server/internal/scanning/AnnotationAcceptingListener.java b/core-server/src/main/java/org/glassfish/jersey/server/internal/scanning/AnnotationAcceptingListener.java
index df41359..420db8f 100644
--- a/core-server/src/main/java/org/glassfish/jersey/server/internal/scanning/AnnotationAcceptingListener.java
+++ b/core-server/src/main/java/org/glassfish/jersey/server/internal/scanning/AnnotationAcceptingListener.java
@@ -276,6 +276,12 @@
             return null;
         }
 
+        @Override
+        public ClassVisitor getDelegate() {
+            //do nothing
+            return null;
+        }
+
         private Class getClassForName(final String className) {
             try {
                 final OsgiRegistry osgiRegistry = ReflectionHelper.getOsgiRegistryInstance();
@@ -303,7 +309,7 @@
 
     private static class ClassReaderWrapper {
         private static final Logger LOGGER = Logger.getLogger(ClassReader.class.getName());
-        private static final int WARN_VERSION = Opcodes.V19;
+        private static final int WARN_VERSION = Opcodes.V20;
         private static final int INPUT_STREAM_DATA_CHUNK_SIZE = 4096;
 
         private final byte[] b;
diff --git a/core-server/src/main/resources/META-INF/NOTICE.markdown b/core-server/src/main/resources/META-INF/NOTICE.markdown
index 9399ca7..f06adeb 100644
--- a/core-server/src/main/resources/META-INF/NOTICE.markdown
+++ b/core-server/src/main/resources/META-INF/NOTICE.markdown
@@ -36,7 +36,7 @@
 * Copyright (c) 2015-2018 Oracle and/or its affiliates. All rights reserved.
 * Copyright 2010-2013 Coda Hale and Yammer, Inc.
 
-org.objectweb.asm Version 9.3
+org.objectweb.asm Version 9.4
 * License: Modified BSD (https://asm.ow2.io/license.html)
 * Copyright: (c) 2000-2011 INRIA, France Telecom. All rights reserved.
 
diff --git a/pom.xml b/pom.xml
index 1fe9764..5d47d1b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2148,7 +2148,7 @@
         <jersey.version>${project.version}</jersey.version>
         <!-- asm is now source integrated - keeping this property to see the version -->
         <!-- see core-server/src/main/java/jersey/repackaged/asm/.. -->
-        <asm.version>9.3</asm.version>
+        <asm.version>9.4</asm.version>
         <bnd.plugin.version>2.3.6</bnd.plugin.version>
         <commons.io.version>2.11.0</commons.io.version>
         <commons-lang3.version>3.3.2</commons-lang3.version>