https://openjdk.java.net/ 
public interface javax.xml.ws.AsyncHandler<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: javax.xml.ws.AsyncHandler
  super_class: java.lang.Object
{
  public abstract void handleResponse(javax.xml.ws.Response<T>);
    descriptor: (Ljavax/xml/ws/Response;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljavax/xml/ws/Response<TT;>;)V
    MethodParameters:
      Name  Flags
      res   
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "AsyncHandler.java"