https://openjdk.java.net/ 
public interface com.sun.beans.decoder.ValueObject
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.beans.decoder.ValueObject
  super_class: java.lang.Object
{
  public abstract java.lang.Object getValue();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract boolean isVoid();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "ValueObject.java"