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.Proxy$ProxyImpl extends net.sf.cglib.proxy.Proxy
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: net.sf.cglib.proxy.Proxy$ProxyImpl
  super_class: net.sf.cglib.proxy.Proxy
{
  protected void <init>(net.sf.cglib.proxy.InvocationHandler);
    descriptor: (Lnet/sf/cglib/proxy/InvocationHandler;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // net.sf.cglib.proxy.Proxy$ProxyImpl this
        start local 1 // net.sf.cglib.proxy.InvocationHandler h
         0: .line 63
            aload 0 /* this */
            aload 1 /* h */
            invokespecial net.sf.cglib.proxy.Proxy.<init>:(Lnet/sf/cglib/proxy/InvocationHandler;)V
         1: .line 64
            return
        end local 1 // net.sf.cglib.proxy.InvocationHandler h
        end local 0 // net.sf.cglib.proxy.Proxy$ProxyImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lnet/sf/cglib/proxy/Proxy$ProxyImpl;
            0    2     1     h  Lnet/sf/cglib/proxy/InvocationHandler;
    MethodParameters:
      Name  Flags
      h     
}
SourceFile: "Proxy.java"
NestHost: net.sf.cglib.proxy.Proxy
InnerClasses:
  private ProxyImpl = net.sf.cglib.proxy.Proxy$ProxyImpl of net.sf.cglib.proxy.Proxy