code: private void sendLockFailError( final ITransaction transaction, final WebdavRequest req, final WebdavResponse resp )
          throws IOException
      {
          final Hashtable<String, WebdavStatus> errorList = new Hashtable<String, WebdavStatus>();
          errorList.put( _path, SC_LOCKED );
          sendReport( req, resp, errorList );
      }
docs: Sends an error report to the client