question: private Reference < ? extends T > dequeue ( ) { if ( false ) VM . sysWriteln ( "in dequeue, this = " , Magic . objectAsAddress ( this ) ) ; lock . lockWithHandshake ( ) ; if ( false ) VM . sysWriteln ( "locked." ) ; Reference < ? extends T > result = dequeueImpl ( ) ; lock . unlock ( ) ; return result ; }
target:  Remove a reference from the queue, if there is one.