https://www.graalvm.org/ 
class com.oracle.truffle.api.test.polyglot.ProxySPITest$5 implements org.graalvm.polyglot.proxy.ProxyExecutable
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.test.polyglot.ProxySPITest$5
  super_class: java.lang.Object
{
  final com.oracle.truffle.api.test.polyglot.ProxySPITest this$0;
    descriptor: Lcom/oracle/truffle/api/test/polyglot/ProxySPITest;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.api.test.polyglot.ProxySPITest);
    descriptor: (Lcom/oracle/truffle/api/test/polyglot/ProxySPITest;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.test.polyglot.ProxySPITest$5 this
         0: .line 372
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.api.test.polyglot.ProxySPITest$5.this$0:Lcom/oracle/truffle/api/test/polyglot/ProxySPITest;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.test.polyglot.ProxySPITest$5 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/test/polyglot/ProxySPITest$5;
    MethodParameters:
        Name  Flags
      this$0  final

  public java.lang.Object execute(org.graalvm.polyglot.Value[]);
    descriptor: ([Lorg/graalvm/polyglot/Value;)Ljava/lang/Object;
    flags: (0x0081) ACC_PUBLIC, ACC_VARARGS
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.test.polyglot.ProxySPITest$5 this
        start local 1 // org.graalvm.polyglot.Value[] t
         0: .line 374
            aload 1 /* t */
            iconst_0
            aaload
            invokevirtual org.graalvm.polyglot.Value.asInt:()I
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            areturn
        end local 1 // org.graalvm.polyglot.Value[] t
        end local 0 // com.oracle.truffle.api.test.polyglot.ProxySPITest$5 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/test/polyglot/ProxySPITest$5;
            0    1     1     t  [Lorg/graalvm/polyglot/Value;
    MethodParameters:
      Name  Flags
      t     
}
SourceFile: "ProxySPITest.java"
EnclosingMethod: com.oracle.truffle.api.test.polyglot.ProxySPITest.testProxyExecutable:()V
NestHost: com.oracle.truffle.api.test.polyglot.ProxySPITest
InnerClasses:
  com.oracle.truffle.api.test.polyglot.ProxySPITest$5