https://github.com/cglib/cglib/cglib: cglib is a powerful, high performance and quality Code Generation Library, It is used to extend JAVA classes and implements interfaces at runtime. 
public class net.sf.cglib.transform.AnnotationVisitorTee extends org.objectweb.asm.AnnotationVisitor
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: net.sf.cglib.transform.AnnotationVisitorTee
  super_class: org.objectweb.asm.AnnotationVisitor
{
  private org.objectweb.asm.AnnotationVisitor av1;
    descriptor: Lorg/objectweb/asm/AnnotationVisitor;
    flags: (0x0002) ACC_PRIVATE

  private org.objectweb.asm.AnnotationVisitor av2;
    descriptor: Lorg/objectweb/asm/AnnotationVisitor;
    flags: (0x0002) ACC_PRIVATE

  public static org.objectweb.asm.AnnotationVisitor getInstance(org.objectweb.asm.AnnotationVisitor, org.objectweb.asm.AnnotationVisitor);
    descriptor: (Lorg/objectweb/asm/AnnotationVisitor;Lorg/objectweb/asm/AnnotationVisitor;)Lorg/objectweb/asm/AnnotationVisitor;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.objectweb.asm.AnnotationVisitor av1
        start local 1 // org.objectweb.asm.AnnotationVisitor av2
         0: .line 25
            aload 0 /* av1 */
            ifnonnull 2
         1: .line 26
            aload 1 /* av2 */
            areturn
         2: .line 27
      StackMap locals:
      StackMap stack:
            aload 1 /* av2 */
            ifnonnull 4
         3: .line 28
            aload 0 /* av1 */
            areturn
         4: .line 29
      StackMap locals:
      StackMap stack:
            new net.sf.cglib.transform.AnnotationVisitorTee
            dup
            aload 0 /* av1 */
            aload 1 /* av2 */
            invokespecial net.sf.cglib.transform.AnnotationVisitorTee.<init>:(Lorg/objectweb/asm/AnnotationVisitor;Lorg/objectweb/asm/AnnotationVisitor;)V
            areturn
        end local 1 // org.objectweb.asm.AnnotationVisitor av2
        end local 0 // org.objectweb.asm.AnnotationVisitor av1
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0   av1  Lorg/objectweb/asm/AnnotationVisitor;
            0    5     1   av2  Lorg/objectweb/asm/AnnotationVisitor;
    MethodParameters:
      Name  Flags
      av1   
      av2   

  public void <init>(org.objectweb.asm.AnnotationVisitor, org.objectweb.asm.AnnotationVisitor);
    descriptor: (Lorg/objectweb/asm/AnnotationVisitor;Lorg/objectweb/asm/AnnotationVisitor;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
        start local 1 // org.objectweb.asm.AnnotationVisitor av1
        start local 2 // org.objectweb.asm.AnnotationVisitor av2
         0: .line 33
            aload 0 /* this */
            getstatic net.sf.cglib.core.Constants.ASM_API:I
            invokespecial org.objectweb.asm.AnnotationVisitor.<init>:(I)V
         1: .line 34
            aload 0 /* this */
            aload 1 /* av1 */
            putfield net.sf.cglib.transform.AnnotationVisitorTee.av1:Lorg/objectweb/asm/AnnotationVisitor;
         2: .line 35
            aload 0 /* this */
            aload 2 /* av2 */
            putfield net.sf.cglib.transform.AnnotationVisitorTee.av2:Lorg/objectweb/asm/AnnotationVisitor;
         3: .line 36
            return
        end local 2 // org.objectweb.asm.AnnotationVisitor av2
        end local 1 // org.objectweb.asm.AnnotationVisitor av1
        end local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lnet/sf/cglib/transform/AnnotationVisitorTee;
            0    4     1   av1  Lorg/objectweb/asm/AnnotationVisitor;
            0    4     2   av2  Lorg/objectweb/asm/AnnotationVisitor;
    MethodParameters:
      Name  Flags
      av1   
      av2   

  public void visit(java.lang.String, java.lang.Object);
    descriptor: (Ljava/lang/String;Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
        start local 1 // java.lang.String name
        start local 2 // java.lang.Object value
         0: .line 39
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av2:Lorg/objectweb/asm/AnnotationVisitor;
            aload 1 /* name */
            aload 2 /* value */
            invokevirtual org.objectweb.asm.AnnotationVisitor.visit:(Ljava/lang/String;Ljava/lang/Object;)V
         1: .line 40
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av2:Lorg/objectweb/asm/AnnotationVisitor;
            aload 1 /* name */
            aload 2 /* value */
            invokevirtual org.objectweb.asm.AnnotationVisitor.visit:(Ljava/lang/String;Ljava/lang/Object;)V
         2: .line 41
            return
        end local 2 // java.lang.Object value
        end local 1 // java.lang.String name
        end local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lnet/sf/cglib/transform/AnnotationVisitorTee;
            0    3     1   name  Ljava/lang/String;
            0    3     2  value  Ljava/lang/Object;
    MethodParameters:
       Name  Flags
      name   
      value  

  public void visitEnum(java.lang.String, java.lang.String, java.lang.String);
    descriptor: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
        start local 1 // java.lang.String name
        start local 2 // java.lang.String desc
        start local 3 // java.lang.String value
         0: .line 44
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av1:Lorg/objectweb/asm/AnnotationVisitor;
            aload 1 /* name */
            aload 2 /* desc */
            aload 3 /* value */
            invokevirtual org.objectweb.asm.AnnotationVisitor.visitEnum:(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
         1: .line 45
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av2:Lorg/objectweb/asm/AnnotationVisitor;
            aload 1 /* name */
            aload 2 /* desc */
            aload 3 /* value */
            invokevirtual org.objectweb.asm.AnnotationVisitor.visitEnum:(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
         2: .line 46
            return
        end local 3 // java.lang.String value
        end local 2 // java.lang.String desc
        end local 1 // java.lang.String name
        end local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lnet/sf/cglib/transform/AnnotationVisitorTee;
            0    3     1   name  Ljava/lang/String;
            0    3     2   desc  Ljava/lang/String;
            0    3     3  value  Ljava/lang/String;
    MethodParameters:
       Name  Flags
      name   
      desc   
      value  

  public org.objectweb.asm.AnnotationVisitor visitAnnotation(java.lang.String, java.lang.String);
    descriptor: (Ljava/lang/String;Ljava/lang/String;)Lorg/objectweb/asm/AnnotationVisitor;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
        start local 1 // java.lang.String name
        start local 2 // java.lang.String desc
         0: .line 49
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av1:Lorg/objectweb/asm/AnnotationVisitor;
            aload 1 /* name */
            aload 2 /* desc */
            invokevirtual org.objectweb.asm.AnnotationVisitor.visitAnnotation:(Ljava/lang/String;Ljava/lang/String;)Lorg/objectweb/asm/AnnotationVisitor;
         1: .line 50
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av2:Lorg/objectweb/asm/AnnotationVisitor;
            aload 1 /* name */
            aload 2 /* desc */
            invokevirtual org.objectweb.asm.AnnotationVisitor.visitAnnotation:(Ljava/lang/String;Ljava/lang/String;)Lorg/objectweb/asm/AnnotationVisitor;
         2: .line 49
            invokestatic net.sf.cglib.transform.AnnotationVisitorTee.getInstance:(Lorg/objectweb/asm/AnnotationVisitor;Lorg/objectweb/asm/AnnotationVisitor;)Lorg/objectweb/asm/AnnotationVisitor;
            areturn
        end local 2 // java.lang.String desc
        end local 1 // java.lang.String name
        end local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lnet/sf/cglib/transform/AnnotationVisitorTee;
            0    3     1  name  Ljava/lang/String;
            0    3     2  desc  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      name  
      desc  

  public org.objectweb.asm.AnnotationVisitor visitArray(java.lang.String);
    descriptor: (Ljava/lang/String;)Lorg/objectweb/asm/AnnotationVisitor;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
        start local 1 // java.lang.String name
         0: .line 54
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av1:Lorg/objectweb/asm/AnnotationVisitor;
            aload 1 /* name */
            invokevirtual org.objectweb.asm.AnnotationVisitor.visitArray:(Ljava/lang/String;)Lorg/objectweb/asm/AnnotationVisitor;
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av2:Lorg/objectweb/asm/AnnotationVisitor;
            aload 1 /* name */
            invokevirtual org.objectweb.asm.AnnotationVisitor.visitArray:(Ljava/lang/String;)Lorg/objectweb/asm/AnnotationVisitor;
            invokestatic net.sf.cglib.transform.AnnotationVisitorTee.getInstance:(Lorg/objectweb/asm/AnnotationVisitor;Lorg/objectweb/asm/AnnotationVisitor;)Lorg/objectweb/asm/AnnotationVisitor;
            areturn
        end local 1 // java.lang.String name
        end local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lnet/sf/cglib/transform/AnnotationVisitorTee;
            0    1     1  name  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      name  

  public void visitEnd();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
         0: .line 58
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av1:Lorg/objectweb/asm/AnnotationVisitor;
            invokevirtual org.objectweb.asm.AnnotationVisitor.visitEnd:()V
         1: .line 59
            aload 0 /* this */
            getfield net.sf.cglib.transform.AnnotationVisitorTee.av2:Lorg/objectweb/asm/AnnotationVisitor;
            invokevirtual org.objectweb.asm.AnnotationVisitor.visitEnd:()V
         2: .line 60
            return
        end local 0 // net.sf.cglib.transform.AnnotationVisitorTee this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lnet/sf/cglib/transform/AnnotationVisitorTee;
}
SourceFile: "AnnotationVisitorTee.java"