private static boolean isInUnion(Data data) {
		for (Data parent = data; parent != null; parent = parent.getParent()) {
			if (parent.getDataType() instanceof Union) {
				return true;
			}
		}
		return false;
	}
EditLabelAction calls this method when an action occurs. At this point in
time, all we want to do is to display the Add Label Dialog.
@param context the action context
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/label/LabelMgrPlugin.java