code: function after(results, next) {
      item.trigger('after:' + method, function done(error) {
        next(error, results);
      });
    }
docs: Trigger execution of after hooks, pass results from the peristence to keep
  it consistent with the callback of persistance if no after hooks are provided.
  
  @param {Object} results of persistence
  @param {Function} next callback
  @api private