/guava/android/guava/src/com/google/common/util/concurrent/CycleDetectingLockFactory.java
lockStateChanged( this) ;lockStateChanged( readWriteLock) ;
lockStateChanged ( readWriteLock ) ;
@Override public void lock() { aboutToAcquire(readWriteLock); try { super.lock(); } finally { <extra_id_0> } } @Override public void lockInterruptibly() throws InterruptedException { aboutToAcquire(readWriteLock); try {