asyncHandler.setName("asyncHandler");
asyncHandler.setCallback(true);
asyncHandler.setClassName(getAsyncClassName(method, "AsyncHandler"));
asyncHandler.setStyle(JavaType.Style.IN);
callbackMethod.addParameter(asyncHandler);
JAnnotation asyncHandlerAnnotation = new JAnnotation(WebParam.class);
asyncHandlerAnnotation.addElement(new JAnnotationElement("name", "asyncHandler"));
asyncHandlerAnnotation.addElement(new JAnnotationElement("targetNamespace", ""));
asyncHandler.addAnnotation("WebParam", asyncHandlerAnnotation);