public void clearStatusMessages() {
		if (statusBar == null) {
			return;
		}

		if (statusBar == null) {
			return;
		}

		statusBar.clearStatusMessages();

		Iterator<DetachedWindowNode> iter = detachedWindows.iterator();
		while (iter.hasNext()) {
			DetachedWindowNode winNode = iter.next();
			winNode.clearStatusMessages();
		}
	}
Release all resources. The root node is no longer viable.
Ghidra/Framework/Docking/src/main/java/docking/RootNode.java