monitor.leave();
      }
    } else {
      return false;
    }
  }

  /**
   * Inserts the specified element at the tail of this queue, waiting up to the specified wait time
   * for space to become available if the queue is full.
   *
   * @throws InterruptedException {@inheritDoc}
   * @throws NullPointerException {@inheritDoc}
   */
  @CanIgnoreReturnValue
  @Override

        monitor.leave();
      }
    } else {
      return false;
    }
  }

  /**
   * Inserts the specified element at the tail of this queue, waiting up to the specified wait time
   * for space to become available if the queue is full.
   *
   * @throws InterruptedException {@inheritDoc}
   * @throws NullPointerException {@inheritDoc}
   */
  @CanIgnoreReturnValue
  @Override