Piwik\Plugins\CoreUpdater\Commands\Update\CliUpdateObserver::onStartExecutingMigration PHP Метод

    public function onStartExecutingMigration($updateFile, Migration $migration)
    {
        $string = $migration->__toString();
        $this->output->write("  Executing <comment>{$string}</comment>... ");
        ++$this->currentMigrationQueryExecutionCount;
    }