dist/ng-tree-dnd.debug.js
function add(scope, element) {
        updateDelayed();

        items.push({
            element: element,
            scope:   scope
        });
    }
function add(scope, element) {
        updateDelayed();

        items.push({
            element: element,
            scope:   scope
        });
    }
function add ( scope , element ) { updateDelayed ( ) ; items . push ( { element : element , scope : scope } ) ; }
Add listener for event
@param element
@param callback
Add listener for event