code: function(options) {
        options = langx.mixin({parse: true}, options);
        var entity = this;
        var success = options.success;
        options.success = function(resp) {
          var serverAttrs = options.parse ? entity.parse(resp, options) : resp;
          if (!entity.set(serverAttrs, options)) return false;
          if (success) success.call(options.context, entity, resp, options);
          entity.trigger('sync', entity, resp, options);
        };
        wrapError(this, options);
        return this.sync('read', this, options);
      }
docs: Fetch the entity from the server, merging the response with the entity's local attributes. Any changed attributes will trigger a "change" event.