public GTreeState getTreeState(GTreeNode node) {
		return new GTreeState(this, node);
	}
Returns a state object that allows this tree to later restore its expanded and selected
state.
<p>
<b>Note: </b>See the usage note at the header of this class concerning how tree state is used
relative to the <code>equals()</code> method.

@return the saved state
Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/GTree.java