code: public void writeLocked (@Nonnull final Runnable aRunnable)
    {
      writeLock ().lock ();
      try
      {
        aRunnable.run ();
      }
      finally
      {
        writeLock ().unlock ();
      }
    }
docs: Execute the provided runnable in a write lock.
  
  @param aRunnable
  Runnable to be executed. May not be <code>null</code>.