private GTree createTree() {
		GTree tree = new GTree(new EmptyRootNode());
		tree.setPaintHandlesForLeafNodes(false);
		return tree;
	}
A variable used to restrict open-ended operations, like expanding all nodes or filtering.
Ghidra/Features/DecompilerDependent/src/main/java/ghidra/app/plugin/core/decompiler/taint/TaintSliceTreeProvider.java