https://openjdk.java.net/ 
public interface com.sun.jdi.ClassLoaderReference extends com.sun.jdi.ObjectReference
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.jdi.ClassLoaderReference
  super_class: java.lang.Object
{
  public abstract java.util.List<com.sun.jdi.ReferenceType> definedClasses();
    descriptor: ()Ljava/util/List;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/List<Lcom/sun/jdi/ReferenceType;>;

  public abstract java.util.List<com.sun.jdi.ReferenceType> visibleClasses();
    descriptor: ()Ljava/util/List;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/List<Lcom/sun/jdi/ReferenceType;>;
}
SourceFile: "ClassLoaderReference.java"