boolean isOnSymbol(ListingActionContext context) {
		return getSymbol(context) != null;
	}
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