Nextras\Datagrid\Datagrid::getter PHP Метод

    public function getter($row, $column, $need = true)
    {
        if ($this->columnGetterCallback) {
            return call_user_func($this->columnGetterCallback, $row, $column);
        } else {
            if (!isset($row->{$column})) {
                if ($need) {
                    throw new \InvalidArgumentException("Result row does not have '{$column}' column.");
                } else {
                    return null;
                }
            }
            return $row->{$column};
        }
    }