https://openjdk.java.net/ 
public interface com.sun.tools.internal.ws.api.wsdl.TWSDLExtension
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.tools.internal.ws.api.wsdl.TWSDLExtension
  super_class: java.lang.Object
{
  public abstract com.sun.tools.internal.ws.api.wsdl.TWSDLExtensible getParent();
    descriptor: ()Lcom/sun/tools/internal/ws/api/wsdl/TWSDLExtensible;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "TWSDLExtension.java"