/**
* Queries whether the given thread is waiting to acquire this lock. Note that because
* cancellations may occur at any time, a <tt>true</tt> return does not guarantee that this thread
* will ever acquire this lock. This method is designed primarily for use in monitoring of the
* system state.
*
* @param thread the thread
* @return true if the given thread is queued waiting for this lock.
* @throws NullPointerException if thread is null
*/
public final boolean hasQueuedThread(Thread thread) {
return sync.isQueued(thread);
}
