void checkInUse() throws FileInUseException {
		synchronized (fileSystem) {
			if (busy.get() || getOpenedDomainObject() != null) {
				throw new FileInUseException(name + " is in use");
			}
		}
	}
Perform file in-use / busy check
@throws FileInUseException if file is in-use or busy
Ghidra/Framework/Project/src/main/java/ghidra/framework/data/GhidraFileData.java