https://www.graalvm.org/ 
interface com.oracle.truffle.sl.test.PassItselfBackViaContextTest$CallWithValue
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.sl.test.PassItselfBackViaContextTest$CallWithValue
  super_class: java.lang.Object
{
  public abstract void call(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      value  
}
SourceFile: "PassItselfBackViaContextTest.java"
NestHost: com.oracle.truffle.sl.test.PassItselfBackViaContextTest
InnerClasses:
  abstract CallWithValue = com.oracle.truffle.sl.test.PassItselfBackViaContextTest$CallWithValue of com.oracle.truffle.sl.test.PassItselfBackViaContextTest
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()