Pagekit\Database\Table::addIndex PHP Метод

    public function addIndex(array $columnNames, $indexName = null, array $flags = array(), array $options = array())
    {
        if ($indexName) {
            $indexName = $this->connection->replacePrefix($indexName);
        }
        $this->table->addIndex($columnNames, $indexName, $flags, $options);
        return $this;
    }