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.MixinEmitter extends net.sf.cglib.core.ClassEmitter
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: net.sf.cglib.proxy.MixinEmitter
  super_class: net.sf.cglib.core.ClassEmitter
{
  private static final java.lang.String FIELD_NAME;
    descriptor: Ljava/lang/String;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: "CGLIB$DELEGATES"

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

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

  private static final net.sf.cglib.core.Signature NEW_INSTANCE;
    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=8, locals=0, args_size=0
         0: .line 31
            ldc "Object[]"
            invokestatic net.sf.cglib.core.TypeUtils.parseConstructor:(Ljava/lang/String;)Lnet/sf/cglib/core/Signature;
         1: .line 30
            putstatic net.sf.cglib.proxy.MixinEmitter.CSTRUCT_OBJECT_ARRAY:Lnet/sf/cglib/core/Signature;
         2: .line 33
            ldc "net.sf.cglib.proxy.Mixin"
            invokestatic net.sf.cglib.core.TypeUtils.parseType:(Ljava/lang/String;)Lorg/objectweb/asm/Type;
         3: .line 32
            putstatic net.sf.cglib.proxy.MixinEmitter.MIXIN:Lorg/objectweb/asm/Type;
         4: .line 35
            new net.sf.cglib.core.Signature
            dup
            ldc "newInstance"
            getstatic net.sf.cglib.proxy.MixinEmitter.MIXIN:Lorg/objectweb/asm/Type;
            iconst_1
            anewarray org.objectweb.asm.Type
            dup
            iconst_0
            getstatic net.sf.cglib.core.Constants.TYPE_OBJECT_ARRAY:Lorg/objectweb/asm/Type;
            aastore
            invokespecial net.sf.cglib.core.Signature.<init>:(Ljava/lang/String;Lorg/objectweb/asm/Type;[Lorg/objectweb/asm/Type;)V
         5: .line 34
            putstatic net.sf.cglib.proxy.MixinEmitter.NEW_INSTANCE:Lnet/sf/cglib/core/Signature;
         6: .line 35
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>(org.objectweb.asm.ClassVisitor, java.lang.String, java.lang.Class[], int[]);
    descriptor: (Lorg/objectweb/asm/ClassVisitor;Ljava/lang/String;[Ljava/lang/Class;[I)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=12, args_size=5
        start local 0 // net.sf.cglib.proxy.MixinEmitter this
        start local 1 // org.objectweb.asm.ClassVisitor v
        start local 2 // java.lang.String className
        start local 3 // java.lang.Class[] classes
        start local 4 // int[] route
         0: .line 38
            aload 0 /* this */
            aload 1 /* v */
            invokespecial net.sf.cglib.core.ClassEmitter.<init>:(Lorg/objectweb/asm/ClassVisitor;)V
         1: .line 40
            aload 0 /* this */
            bipush 52
         2: .line 41
            iconst_1
         3: .line 42
            aload 2 /* className */
         4: .line 43
            getstatic net.sf.cglib.proxy.MixinEmitter.MIXIN:Lorg/objectweb/asm/Type;
         5: .line 44
            aload 0 /* this */
            aload 3 /* classes */
            invokevirtual net.sf.cglib.proxy.MixinEmitter.getInterfaces:([Ljava/lang/Class;)[Ljava/lang/Class;
            invokestatic net.sf.cglib.core.TypeUtils.getTypes:([Ljava/lang/Class;)[Lorg/objectweb/asm/Type;
         6: .line 45
            ldc "<generated>"
         7: .line 40
            invokevirtual net.sf.cglib.proxy.MixinEmitter.begin_class:(IILjava/lang/String;Lorg/objectweb/asm/Type;[Lorg/objectweb/asm/Type;Ljava/lang/String;)V
         8: .line 46
            aload 0 /* this */
            invokestatic net.sf.cglib.core.EmitUtils.null_constructor:(Lnet/sf/cglib/core/ClassEmitter;)V
         9: .line 47
            aload 0 /* this */
            getstatic net.sf.cglib.proxy.MixinEmitter.NEW_INSTANCE:Lnet/sf/cglib/core/Signature;
            invokestatic net.sf.cglib.core.EmitUtils.factory_method:(Lnet/sf/cglib/core/ClassEmitter;Lnet/sf/cglib/core/Signature;)V
        10: .line 49
            aload 0 /* this */
            iconst_2
            ldc "CGLIB$DELEGATES"
            getstatic net.sf.cglib.core.Constants.TYPE_OBJECT_ARRAY:Lorg/objectweb/asm/Type;
            aconst_null
            invokevirtual net.sf.cglib.proxy.MixinEmitter.declare_field:(ILjava/lang/String;Lorg/objectweb/asm/Type;Ljava/lang/Object;)V
        11: .line 51
            aload 0 /* this */
            iconst_1
            getstatic net.sf.cglib.proxy.MixinEmitter.CSTRUCT_OBJECT_ARRAY:Lnet/sf/cglib/core/Signature;
            aconst_null
            invokevirtual net.sf.cglib.proxy.MixinEmitter.begin_method:(ILnet/sf/cglib/core/Signature;[Lorg/objectweb/asm/Type;)Lnet/sf/cglib/core/CodeEmitter;
            astore 5 /* e */
        start local 5 // net.sf.cglib.core.CodeEmitter e
        12: .line 52
            aload 5 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.load_this:()V
        13: .line 53
            aload 5 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.super_invoke_constructor:()V
        14: .line 54
            aload 5 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.load_this:()V
        15: .line 55
            aload 5 /* e */
            iconst_0
            invokevirtual net.sf.cglib.core.CodeEmitter.load_arg:(I)V
        16: .line 56
            aload 5 /* e */
            ldc "CGLIB$DELEGATES"
            invokevirtual net.sf.cglib.core.CodeEmitter.putfield:(Ljava/lang/String;)V
        17: .line 57
            aload 5 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.return_value:()V
        18: .line 58
            aload 5 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.end_method:()V
        19: .line 60
            new java.util.HashSet
            dup
            invokespecial java.util.HashSet.<init>:()V
            astore 6 /* unique */
        start local 6 // java.util.Set unique
        20: .line 61
            iconst_0
            istore 7 /* i */
        start local 7 // int i
        21: goto 44
        22: .line 62
      StackMap locals: net.sf.cglib.proxy.MixinEmitter org.objectweb.asm.ClassVisitor java.lang.String java.lang.Class[] int[] net.sf.cglib.core.CodeEmitter java.util.Set int
      StackMap stack:
            aload 0 /* this */
            aload 3 /* classes */
            iload 7 /* i */
            aaload
            invokevirtual net.sf.cglib.proxy.MixinEmitter.getMethods:(Ljava/lang/Class;)[Ljava/lang/reflect/Method;
            astore 8 /* methods */
        start local 8 // java.lang.reflect.Method[] methods
        23: .line 63
            iconst_0
            istore 9 /* j */
        start local 9 // int j
        24: goto 42
        25: .line 64
      StackMap locals: java.lang.reflect.Method[] int
      StackMap stack:
            aload 6 /* unique */
            aload 8 /* methods */
            iload 9 /* j */
            aaload
            invokestatic net.sf.cglib.core.MethodWrapper.create:(Ljava/lang/reflect/Method;)Ljava/lang/Object;
            invokeinterface java.util.Set.add:(Ljava/lang/Object;)Z
            ifeq 41
        26: .line 65
            aload 8 /* methods */
            iload 9 /* j */
            aaload
            invokestatic net.sf.cglib.core.ReflectUtils.getMethodInfo:(Ljava/lang/reflect/Member;)Lnet/sf/cglib/core/MethodInfo;
            astore 10 /* method */
        start local 10 // net.sf.cglib.core.MethodInfo method
        27: .line 66
            iconst_1
            istore 11 /* modifiers */
        start local 11 // int modifiers
        28: .line 67
            aload 10 /* method */
            invokevirtual net.sf.cglib.core.MethodInfo.getModifiers:()I
            sipush 128
            iand
            sipush 128
            if_icmpne 30
        29: .line 68
            iload 11 /* modifiers */
            sipush 128
            ior
            istore 11 /* modifiers */
        30: .line 70
      StackMap locals: net.sf.cglib.core.MethodInfo int
      StackMap stack:
            aload 0 /* this */
            aload 10 /* method */
            iload 11 /* modifiers */
            invokestatic net.sf.cglib.core.EmitUtils.begin_method:(Lnet/sf/cglib/core/ClassEmitter;Lnet/sf/cglib/core/MethodInfo;I)Lnet/sf/cglib/core/CodeEmitter;
            astore 5 /* e */
        31: .line 71
            aload 5 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.load_this:()V
        32: .line 72
            aload 5 /* e */
            ldc "CGLIB$DELEGATES"
            invokevirtual net.sf.cglib.core.CodeEmitter.getfield:(Ljava/lang/String;)V
        33: .line 73
            aload 5 /* e */
            aload 4 /* route */
            ifnull 34
            aload 4 /* route */
            iload 7 /* i */
            iaload
            goto 35
      StackMap locals:
      StackMap stack: net.sf.cglib.core.CodeEmitter
        34: iload 7 /* i */
      StackMap locals: net.sf.cglib.proxy.MixinEmitter org.objectweb.asm.ClassVisitor java.lang.String java.lang.Class[] int[] net.sf.cglib.core.CodeEmitter java.util.Set int java.lang.reflect.Method[] int net.sf.cglib.core.MethodInfo int
      StackMap stack: net.sf.cglib.core.CodeEmitter int
        35: invokevirtual net.sf.cglib.core.CodeEmitter.aaload:(I)V
        36: .line 74
            aload 5 /* e */
            aload 10 /* method */
            invokevirtual net.sf.cglib.core.MethodInfo.getClassInfo:()Lnet/sf/cglib/core/ClassInfo;
            invokevirtual net.sf.cglib.core.ClassInfo.getType:()Lorg/objectweb/asm/Type;
            invokevirtual net.sf.cglib.core.CodeEmitter.checkcast:(Lorg/objectweb/asm/Type;)V
        37: .line 75
            aload 5 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.load_args:()V
        38: .line 76
            aload 5 /* e */
            aload 10 /* method */
            invokevirtual net.sf.cglib.core.CodeEmitter.invoke:(Lnet/sf/cglib/core/MethodInfo;)V
        39: .line 77
            aload 5 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.return_value:()V
        40: .line 78
            aload 5 /* e */
            invokevirtual net.sf.cglib.core.CodeEmitter.end_method:()V
        end local 11 // int modifiers
        end local 10 // net.sf.cglib.core.MethodInfo method
        41: .line 63
      StackMap locals:
      StackMap stack:
            iinc 9 /* j */ 1
      StackMap locals:
      StackMap stack:
        42: iload 9 /* j */
            aload 8 /* methods */
            arraylength
            if_icmplt 25
        end local 9 // int j
        end local 8 // java.lang.reflect.Method[] methods
        43: .line 61
            iinc 7 /* i */ 1
      StackMap locals:
      StackMap stack:
        44: iload 7 /* i */
            aload 3 /* classes */
            arraylength
            if_icmplt 22
        end local 7 // int i
        45: .line 83
            aload 0 /* this */
            invokevirtual net.sf.cglib.proxy.MixinEmitter.end_class:()V
        46: .line 84
            return
        end local 6 // java.util.Set unique
        end local 5 // net.sf.cglib.core.CodeEmitter e
        end local 4 // int[] route
        end local 3 // java.lang.Class[] classes
        end local 2 // java.lang.String className
        end local 1 // org.objectweb.asm.ClassVisitor v
        end local 0 // net.sf.cglib.proxy.MixinEmitter this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   47     0       this  Lnet/sf/cglib/proxy/MixinEmitter;
            0   47     1          v  Lorg/objectweb/asm/ClassVisitor;
            0   47     2  className  Ljava/lang/String;
            0   47     3    classes  [Ljava/lang/Class;
            0   47     4      route  [I
           12   47     5          e  Lnet/sf/cglib/core/CodeEmitter;
           20   47     6     unique  Ljava/util/Set;
           21   45     7          i  I
           23   43     8    methods  [Ljava/lang/reflect/Method;
           24   43     9          j  I
           27   41    10     method  Lnet/sf/cglib/core/MethodInfo;
           28   41    11  modifiers  I
    MethodParameters:
           Name  Flags
      v          
      className  
      classes    
      route      

  protected java.lang.Class[] getInterfaces(java.lang.Class[]);
    descriptor: ([Ljava/lang/Class;)[Ljava/lang/Class;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // net.sf.cglib.proxy.MixinEmitter this
        start local 1 // java.lang.Class[] classes
         0: .line 87
            aload 1 /* classes */
            areturn
        end local 1 // java.lang.Class[] classes
        end local 0 // net.sf.cglib.proxy.MixinEmitter this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lnet/sf/cglib/proxy/MixinEmitter;
            0    1     1  classes  [Ljava/lang/Class;
    MethodParameters:
         Name  Flags
      classes  

  protected java.lang.reflect.Method[] getMethods(java.lang.Class);
    descriptor: (Ljava/lang/Class;)[Ljava/lang/reflect/Method;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // net.sf.cglib.proxy.MixinEmitter this
        start local 1 // java.lang.Class type
         0: .line 91
            aload 1 /* type */
            invokevirtual java.lang.Class.getMethods:()[Ljava/lang/reflect/Method;
            areturn
        end local 1 // java.lang.Class type
        end local 0 // net.sf.cglib.proxy.MixinEmitter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lnet/sf/cglib/proxy/MixinEmitter;
            0    1     1  type  Ljava/lang/Class;
    MethodParameters:
      Name  Flags
      type  
}
SourceFile: "MixinEmitter.java"