public boolean isEmpty() {
		return actions.isEmpty();
	}
Creates new MultipleKeyAction

@param tool used to determine context
@param provider the provider, if any, associated with the action
@param action action that will be added to the list of actions bound to a keystroke
@param keyStroke the keystroke, if any, associated with the action
Ghidra/Framework/Docking/src/main/java/docking/action/MultipleKeyAction.java