code: function (newValue) {
          var functionToExecute = newValue ? 'addClass' : 'removeClass';
          var elements = this._elementDOM.find('div');
  
          for (var iterator = 0; iterator < elements.length; iterator++) {
            var element = angular.element(elements[iterator]);
  
            if (element.hasClass('angular-mapboxgl-map-loader')) {
              element[functionToExecute]('angular-mapboxgl-map-loading');
            }
          }
        }
docs: /* Loading Overlay