https://openjdk.java.net/ 
public interface sun.jvm.hotspot.debugger.cdbg.FieldIdentifier
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.jvm.hotspot.debugger.cdbg.FieldIdentifier
  super_class: java.lang.Object
{
  public abstract sun.jvm.hotspot.debugger.cdbg.Type getType();
    descriptor: ()Lsun/jvm/hotspot/debugger/cdbg/Type;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

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