@Override
	public boolean isBusy() {
		return connection.isBusy(this);
	}
When checking for register validity, we consider it valid if it or any of its parents are
valid, or any alias thereof.
Ghidra/Debug/Debugger-rmi-trace/src/main/java/ghidra/app/plugin/core/debug/service/tracermi/TraceRmiTarget.java