/**
* Acquires the lock.
*
* <p>Acquires the lock if it is not held by another thread and returns immediately, setting the
* lock hold count to one.
*
* <p>If the current thread already holds the lock then the hold count is incremented by one and
* the method returns immediately.
*
* <p>If the lock is held by another thread then the current thread becomes disabled for thread
* scheduling purposes and lies dormant until the lock has been acquired, at which time the lock
* hold count is set to one.
*/
public void lock() {
sync.lock();
}
