code: public static InvocationResponse result(String payload) {
  		InvocationResponse resp = new InvocationResponse(RESULT);
  		resp.resultPayload = payload;
  		return resp;
  	}
docs: Creates a new {@link InvocationResponse} to hold the result of an
  invocation.
  
  @param result
  - the result of the invocation, or null if the method returns
  void.
  @return the invocation request.