jstree: how to get the id of undetermined state of node <p>I use the jstree('get_selected',false) to get the selected node of my jstree with checkbox plugins, but the result doesn't include the node with undetermined state . How can I get all of the selected node include undetermined ones.</p> <p>the newest version of jstree does not include the method 'get_checked', why?</p> <p>thanks.</p>