handleBlur = function(event) {
          // Attach before ngModel's blur listener to stop propagation of blur event
          // and prevent setting $touched.
          if (untouched) {
            untouched = false;
            if (selectScope._mdSelectIsOpen) {
              event.stopImmediatePropagation();
            }
          }

          containerCtrl && containerCtrl.setFocused(false);
          inputCheckValue();
        }
@param {boolean} isPlaceholder true to mark the md-select-value element and
 input container, if one exists, with classes for styling when a placeholder is present.
 false to remove those classes.