Piwik\DataAccess\LogQueryBuilder\JoinTables::checkTableCanBeUsedForSegmentation PHP Method

    private function checkTableCanBeUsedForSegmentation($tableName)
    {
        if (!is_array($tableName) && !$this->getLogTable($tableName)) {
            throw new Exception("Table '{$tableName}' can't be used for segmentation");
        }
    }