void expandAll(GroupPath gp) {
		TreePath path = getTreePathFromGroup(gp);
		if (path != null) {
			expandNode((ProgramNode) path.getLastPathComponent());
		}
	}
Recursively expand all descendants in the given group path.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/programtree/ProgramDnDTree.java