3 name: functions-getstate
6 Get the state of tree: which nodes are open and which one is selected?
8 Returns a javascript object that contains the ids of open nodes and selected nodes:
12 open_nodes: [1, 2, 3],
13 selected_node: [4, 5, 6]
17 If you want to use this function, then your tree data should include an **id** property for each node.
19 You can use this function in combination with [setState](#functions-setstate) to save and restore the tree state.