https://www.graalvm.org/ 
public interface com.oracle.truffle.api.test.polyglot.ValueHostInteropTest$FunctionalWithObjectMethodOverrides
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.api.test.polyglot.ValueHostInteropTest$FunctionalWithObjectMethodOverrides
  super_class: java.lang.Object
{
  public abstract boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      obj   

  public abstract int hashCode();
    descriptor: ()I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.lang.Object call(java.lang.Object[]);
    descriptor: ([Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0481) ACC_PUBLIC, ACC_VARARGS, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      args  
}
SourceFile: "ValueHostInteropTest.java"
NestHost: com.oracle.truffle.api.test.polyglot.ValueHostInteropTest
InnerClasses:
  public abstract FunctionalWithObjectMethodOverrides = com.oracle.truffle.api.test.polyglot.ValueHostInteropTest$FunctionalWithObjectMethodOverrides of com.oracle.truffle.api.test.polyglot.ValueHostInteropTest
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()