Called whenever this action is started — added to the list of running actions in the LayoutTree
or TreeContext.
This hook may not be called immediately when added through node.queueAction or node.startAction;
it will wait until the node's first resize so it can connect to the tree.
Called whenever this action is started — added to the list of running actions in the LayoutTree or TreeContext.
This hook may not be called immediately when added through node.queueAction or node.startAction; it will wait until the node's first resize so it can connect to the tree.