code: function showDropDown(scope, element, opts) {
          if (opts.parent !== element.parent()) {
            element.parent().attr('aria-owns', element.attr('id'));
          }
          element.parent().find('md-select-value').attr('aria-hidden', 'true');
  
          opts.parent.append(element);
  
          return $q(function(resolve, reject) {
  
            try {
  
              $animateCss(element, {removeClass: 'md-leave', duration: 0})
                .start()
                .then(positionAndFocusMenu)
                .then(resolve);
  
            } catch (e) {
              reject(e);
            }
  
          });
        }
docs: ************************************ Closure Functions ************************************ 
  Attach the select DOM element(s) and animate to the correct positions
  and scalings...