src/Query.php
protected function _render_group()
    {
        if (!isset($this->args['group'])) {
            return '';
        }

        $g = array_map(function ($a) {
            return $this->_consume($a, 'soft-escape');
        }, $this->args['group']);

        return ' group by '.implode(', ', $g);
    }
protected function _render_group()
    {
        if (!isset($this->args['group'])) {
            return '';
        }

        $g = array_map(function ($a) {
            return $this->_consume($a, 'soft-escape');
        }, $this->args['group']);

        return ' group by '.implode(', ', $g);
    }
Renders [group].

@return string rendered SQL chunk