private boolean isReadGrantedByStrongerLock() {
    // We have read lock, if:
    // (a) This is write thread
    //    AND
    // (b.1) Implicit read lock is enabled
    //   OR
    // (b.2) Explicit write lock has been acquired.
    //   OR
    // (b.3) Explicit write intent lock has been acquired
    return isWriteThread() && (isImplicitReadAllowed() || isWriteAcquired() || isWriteIntentLocked());
  }
private boolean isReadGrantedByStrongerLock()