code: function(result) {
  
  		LOG.warn('execute ' + fullname + ' result: ', l_name);
  		LOG.warn(result, l_name);
  
  		var res_obj = {
  			func: fullname,
  			res: result
  		};
  
  		res_str = JSON.stringify(res_obj);
  		callback();
  	}
docs: prepare callback when done NOTE: callback may not necessarily return, if the number of arguments passed is incorrect