docs: function(el, attrName, oldValue) {
                      if (can.data(can.$(el), "canHasAttributesBindings")) {
                          return setImmediate(function() {
                              can.trigger(el, {
                                      type: "attributes",
                                      attributeName: attrName,
                                      target: el,
                                      oldValue: oldValue,
                                      bubbles: false
                                  }, []);
                          });
                      }
                  }