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. 
class net.sf.cglib.proxy.InvocationHandlerGenerator implements net.sf.cglib.proxy.CallbackGenerator
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: net.sf.cglib.proxy.InvocationHandlerGenerator
  super_class: java.lang.Object
{
  public static final net.sf.cglib.proxy.InvocationHandlerGenerator INSTANCE;
    descriptor: Lnet/sf/cglib/proxy/InvocationHandlerGenerator;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  private static final org.objectweb.asm.Type INVOCATION_HANDLER;
    descriptor: Lorg/objectweb/asm/Type;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final org.objectweb.asm.Type UNDECLARED_THROWABLE_EXCEPTION;
    descriptor: Lorg/objectweb/asm/Type;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final org.objectweb.asm.Type METHOD;
    descriptor: Lorg/objectweb/asm/Type;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final net.sf.cglib.core.Signature INVOKE;
    descriptor: Lnet/sf/cglib/core/Signature;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 25
            new net.sf.cglib.proxy.InvocationHandlerGenerator
            dup
            invokespecial net.sf.cglib.proxy.InvocationHandlerGenerator.<init>:()V
            putstatic net.sf.cglib.proxy.InvocationHandlerGenerator.INSTANCE:Lnet/sf/cglib/proxy/InvocationHandlerGenerator;
         1: .line 28
            ldc "net.sf.cglib.proxy.InvocationHandler"
            invokestatic net.sf.cglib.core.TypeUtils.parseType:(Ljava/lang/String;)Lorg/objectweb/asm/Type;
         2: .line 27
            putstatic net.sf.cglib.proxy.InvocationHandlerGenerator.INVOCATION_HANDLER:Lorg/objectweb/asm/Type;
         3: .line 30
            ldc "net.sf.cglib.proxy.UndeclaredThrowableException"
            invokestatic net.sf.cglib.core.TypeUtils.parseType:(Ljava/lang/String;)Lorg/objectweb/asm/Type;
         4: .line 29
            putstatic net.sf.cglib.proxy.InvocationHandlerGenerator.UNDECLARED_THROWABLE_EXCEPTION:Lorg/objectweb/asm/Type;
         5: .line 32
            ldc "java.lang.reflect.Method"
            invokestatic net.sf.cglib.core.TypeUtils.parseType:(Ljava/lang/String;)Lorg/objectweb/asm/Type;
         6: .line 31
            putstatic net.sf.cglib.proxy.InvocationHandlerGenerator.METHOD:Lorg/objectweb/asm/Type;
         7: .line 34
            ldc "Object invoke(Object, java.lang.reflect.Method, Object[])"
            invokestatic net.sf.cglib.core.TypeUtils.parseSignature:(Ljava/lang/String;)Lnet/sf/cglib/core/Signature;
         8: .line 33
            putstatic net.sf.cglib.proxy.InvocationHandlerGenerator.INVOKE:Lnet/sf/cglib/core/Signature;
         9: .line 34
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // net.sf.cglib.proxy.InvocationHandlerGenerator this
         0: .line 22
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // net.sf.cglib.proxy.InvocationHandlerGenerator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lnet/sf/cglib/proxy/InvocationHandlerGenerator;

  public void generate(net.sf.cglib.core.ClassEmitter, net.sf.cglib.proxy.CallbackGenerator$Context, java.util.List);
    descriptor: (Lnet/sf/cglib/core/ClassEmitter;Lnet/sf/cglib/proxy/CallbackGenerator$Context;Ljava/util/List;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=9, args_size=4
        start local 0 // net.sf.cglib.proxy.InvocationHandlerGenerator this
        start local 1 // net.sf.cglib.core.ClassEmitter ce
        start local 2 // net.sf.cglib.proxy.CallbackGenerator$Context context
        start local 3 // java.util.List methods
         0: .line 37
            aload 3 /* methods */
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 4 /* it */
        start local 4 // java.util.Iterator it
         1: goto 17
         2: .line 38
      StackMap locals: java.util.Iterator
      StackMap stack:
            aload 4 /* it */
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast net.sf.cglib.core.MethodInfo
            astore 5 /* method */
        start local 5 // net.sf.cglib.core.MethodInfo method
         3: .line 39
            aload 2 /* context */
            aload 5 /* method */
            invokeinterface net.sf.cglib.proxy.CallbackGenerator$Context.getImplSignature:(Lnet/sf/cglib/core/MethodInfo;)Lnet/sf/cglib/core/Signature;
            astore 6 /* impl */
        start local 6 // net.sf.cglib.core.Signature impl
         4: .line 40
            aload 1 /* ce */
            bipush 26
            aload 6 /* impl */
            invokevirtual net.sf.cglib.core.Signature.getName:()Ljava/lang/String;
            getstatic net.sf.cglib.proxy.InvocationHandlerGenerator.METHOD:Lorg/objectweb/asm/Type;
            aconst_null
            invokevirtual net.sf.cglib.core.ClassEmitter.declare_field:(ILjava/lang/String;Lorg/objectweb/asm/Type;Ljava/lang/Object;)V
         5: .line 42
            aload 2 /* context */
            aload 1 /* ce */
            aload 5 /* method */
            invokeinterface net.sf.cglib.proxy.CallbackGenerator$Context.beginMethod:(Lnet/sf/cglib/core/ClassEmitter;Lnet/sf/cglib/core/MethodInfo;)Lnet/sf/cglib/core/CodeEmitter;
            astore 7 /* e */
        start local 7 // net.sf.cglib.core.CodeEmitter e
         6: .line 43
            aload 7 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.begin_block:()Lnet/sf/cglib/core/Block;
            astore 8 /* handler */
        start local 8 // net.sf.cglib.core.Block handler
         7: .line 44
            aload 2 /* context */
            aload 7 /* e */
            aload 2 /* context */
            aload 5 /* method */
            invokeinterface net.sf.cglib.proxy.CallbackGenerator$Context.getIndex:(Lnet/sf/cglib/core/MethodInfo;)I
            invokeinterface net.sf.cglib.proxy.CallbackGenerator$Context.emitCallback:(Lnet/sf/cglib/core/CodeEmitter;I)V
         8: .line 45
            aload 7 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.load_this:()V
         9: .line 46
            aload 7 /* e */
            aload 6 /* impl */
            invokevirtual net.sf.cglib.core.Signature.getName:()Ljava/lang/String;
            invokevirtual net.sf.cglib.core.CodeEmitter.getfield:(Ljava/lang/String;)V
        10: .line 47
            aload 7 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.create_arg_array:()V
        11: .line 48
            aload 7 /* e */
            getstatic net.sf.cglib.proxy.InvocationHandlerGenerator.INVOCATION_HANDLER:Lorg/objectweb/asm/Type;
            getstatic net.sf.cglib.proxy.InvocationHandlerGenerator.INVOKE:Lnet/sf/cglib/core/Signature;
            invokevirtual net.sf.cglib.core.CodeEmitter.invoke_interface:(Lorg/objectweb/asm/Type;Lnet/sf/cglib/core/Signature;)V
        12: .line 49
            aload 7 /* e */
            aload 5 /* method */
            invokevirtual net.sf.cglib.core.MethodInfo.getSignature:()Lnet/sf/cglib/core/Signature;
            invokevirtual net.sf.cglib.core.Signature.getReturnType:()Lorg/objectweb/asm/Type;
            invokevirtual net.sf.cglib.core.CodeEmitter.unbox:(Lorg/objectweb/asm/Type;)V
        13: .line 50
            aload 7 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.return_value:()V
        14: .line 51
            aload 8 /* handler */
            invokevirtual net.sf.cglib.core.Block.end:()V
        15: .line 52
            aload 7 /* e */
            aload 8 /* handler */
            aload 5 /* method */
            invokevirtual net.sf.cglib.core.MethodInfo.getExceptionTypes:()[Lorg/objectweb/asm/Type;
            getstatic net.sf.cglib.proxy.InvocationHandlerGenerator.UNDECLARED_THROWABLE_EXCEPTION:Lorg/objectweb/asm/Type;
            invokestatic net.sf.cglib.core.EmitUtils.wrap_undeclared_throwable:(Lnet/sf/cglib/core/CodeEmitter;Lnet/sf/cglib/core/Block;[Lorg/objectweb/asm/Type;Lorg/objectweb/asm/Type;)V
        16: .line 53
            aload 7 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.end_method:()V
        end local 8 // net.sf.cglib.core.Block handler
        end local 7 // net.sf.cglib.core.CodeEmitter e
        end local 6 // net.sf.cglib.core.Signature impl
        end local 5 // net.sf.cglib.core.MethodInfo method
        17: .line 37
      StackMap locals:
      StackMap stack:
            aload 4 /* it */
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 2
        end local 4 // java.util.Iterator it
        18: .line 55
            return
        end local 3 // java.util.List methods
        end local 2 // net.sf.cglib.proxy.CallbackGenerator$Context context
        end local 1 // net.sf.cglib.core.ClassEmitter ce
        end local 0 // net.sf.cglib.proxy.InvocationHandlerGenerator this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   19     0     this  Lnet/sf/cglib/proxy/InvocationHandlerGenerator;
            0   19     1       ce  Lnet/sf/cglib/core/ClassEmitter;
            0   19     2  context  Lnet/sf/cglib/proxy/CallbackGenerator$Context;
            0   19     3  methods  Ljava/util/List;
            1   18     4       it  Ljava/util/Iterator;
            3   17     5   method  Lnet/sf/cglib/core/MethodInfo;
            4   17     6     impl  Lnet/sf/cglib/core/Signature;
            6   17     7        e  Lnet/sf/cglib/core/CodeEmitter;
            7   17     8  handler  Lnet/sf/cglib/core/Block;
    MethodParameters:
         Name  Flags
      ce       
      context  
      methods  

  public void generateStatic(net.sf.cglib.core.CodeEmitter, net.sf.cglib.proxy.CallbackGenerator$Context, java.util.List);
    descriptor: (Lnet/sf/cglib/core/CodeEmitter;Lnet/sf/cglib/proxy/CallbackGenerator$Context;Ljava/util/List;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=6, args_size=4
        start local 0 // net.sf.cglib.proxy.InvocationHandlerGenerator this
        start local 1 // net.sf.cglib.core.CodeEmitter e
        start local 2 // net.sf.cglib.proxy.CallbackGenerator$Context context
        start local 3 // java.util.List methods
         0: .line 58
            aload 3 /* methods */
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 4 /* it */
        start local 4 // java.util.Iterator it
         1: goto 5
         2: .line 59
      StackMap locals: java.util.Iterator
      StackMap stack:
            aload 4 /* it */
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast net.sf.cglib.core.MethodInfo
            astore 5 /* method */
        start local 5 // net.sf.cglib.core.MethodInfo method
         3: .line 60
            aload 1 /* e */
            aload 5 /* method */
            invokestatic net.sf.cglib.core.EmitUtils.load_method:(Lnet/sf/cglib/core/CodeEmitter;Lnet/sf/cglib/core/MethodInfo;)V
         4: .line 61
            aload 1 /* e */
            aload 2 /* context */
            aload 5 /* method */
            invokeinterface net.sf.cglib.proxy.CallbackGenerator$Context.getImplSignature:(Lnet/sf/cglib/core/MethodInfo;)Lnet/sf/cglib/core/Signature;
            invokevirtual net.sf.cglib.core.Signature.getName:()Ljava/lang/String;
            invokevirtual net.sf.cglib.core.CodeEmitter.putfield:(Ljava/lang/String;)V
        end local 5 // net.sf.cglib.core.MethodInfo method
         5: .line 58
      StackMap locals:
      StackMap stack:
            aload 4 /* it */
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 2
        end local 4 // java.util.Iterator it
         6: .line 63
            return
        end local 3 // java.util.List methods
        end local 2 // net.sf.cglib.proxy.CallbackGenerator$Context context
        end local 1 // net.sf.cglib.core.CodeEmitter e
        end local 0 // net.sf.cglib.proxy.InvocationHandlerGenerator this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    7     0     this  Lnet/sf/cglib/proxy/InvocationHandlerGenerator;
            0    7     1        e  Lnet/sf/cglib/core/CodeEmitter;
            0    7     2  context  Lnet/sf/cglib/proxy/CallbackGenerator$Context;
            0    7     3  methods  Ljava/util/List;
            1    6     4       it  Ljava/util/Iterator;
            3    5     5   method  Lnet/sf/cglib/core/MethodInfo;
    MethodParameters:
         Name  Flags
      e        
      context  
      methods  
}
SourceFile: "InvocationHandlerGenerator.java"
InnerClasses:
  public abstract Context = net.sf.cglib.proxy.CallbackGenerator$Context of net.sf.cglib.proxy.CallbackGenerator