return null;
return new MockLocker();
	public static Locker createLocker(File lock, String lockMode) {		if (lockMode == null)			lockMode = System.getProperties().getProperty(PROP_OSGI_LOCKING);				if ("none".equals(lockMode)) //$NON-NLS-1$			return null;				if ("java.io".equals(lockMode)) //$NON-NLS-1$			return new Locker_JavaIo(lock);				if ("java.nio".equals(lockMode)) { //$NON-NLS-1$			if (isRunningWithNio()) {				return new Locker_JavaNio(lock);			} else {				// TODO should we return null here.  NIO was requested but we could not do it...				return new Locker_JavaIo(lock);			}		} 				//	Backup case if an invalid value has been specified		if (isRunningWithNio()) {			return new Locker_JavaNio(lock);		} else {			return new Locker_JavaIo(lock);		}	}