Piwik\Updater::keepBcForOldMigrationQueryFormat PHP Method

    private function keepBcForOldMigrationQueryFormat($index, $migration)
    {
        if (!is_object($migration)) {
            // keep BC for old format (pre 3.0): array($sqlQuery => $errorCodeToIgnore)
            $migrationFactory = StaticContainer::get('Piwik\\Updater\\Migration\\Factory');
            $migration = $migrationFactory->db->sql($index, $migration);
        }
        return $migration;
    }