Suppression méthode inutilisée

        }

    }

    /**

     * @return int

     */

    public function populateIntermediateTableFromSource()

    {

        $connection = $this->destination->getConnection();

        switch (true) {

            case $connection instanceof DbConnection:

                $intermediateTable = $this->destination->getIntermediateTable();

                return $this->databaseService->populateTableFromSource($intermediateTable);

                break;

            default:

                throw ConnectionException::unexpected($connection);

                break;

        }

    }

    /**

     * @return array

     */