code: protected static base_resource[] update_bulk_request(nitro_service service,base_resource resources[]) throws Exception
  	{
  		if (!service.isLogin())
  			service.login();
  		
  		String objtype = resources[0].get_object_type();
  
  		String onerror = service.get_onerror();
  		//String id = service.get_sessionid();
  		String request = service.get_payload_formatter().resource_to_string(resources, null, onerror);
  		String result = put_bulk_data(service,request,objtype);
  		if(resources.length == 1)
  			return resources[0].get_nitro_response(service, result);
  		
  		return resources[0].get_nitro_bulk_response(service, result);
  	}
docs: Use this method to perform a modify operation on multiple MPS resources.
  @param service nitro_service object.
  @return status of the operation performed.
  @throws Exception