https://openjdk.java.net/ 
public interface sun.jvm.hotspot.oops.InstanceKlass$EnclosingMethodAttributeOffset
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.jvm.hotspot.oops.InstanceKlass$EnclosingMethodAttributeOffset
  super_class: java.lang.Object
{
  public static final int enclosing_method_class_index_offset;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 0

  public static final int enclosing_method_method_index_offset;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  public static final int enclosing_method_attribute_size;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 2
}
SourceFile: "InstanceKlass.java"
NestHost: sun.jvm.hotspot.oops.InstanceKlass
InnerClasses:
  public abstract EnclosingMethodAttributeOffset = sun.jvm.hotspot.oops.InstanceKlass$EnclosingMethodAttributeOffset of sun.jvm.hotspot.oops.InstanceKlass