Nette\Database\Table\SqlBuilder::setGroup PHP Метод

    public function setGroup($columns, ...$params)
    {
        $this->group = $columns;
        $this->parameters['group'] = $params;
    }

 /**
  * Sets group clause, more calls rewrite old value.
  * @param  string
  * @return self
  */
 public function group($columns)
 {
     $this->emptyResultSet();
     if (func_num_args() === 2 && strpos($columns, '?') === FALSE) {
         trigger_error('Calling ' . __METHOD__ . '() with second argument is deprecated; use $selection->having() instead.', E_USER_DEPRECATED);
         $this->having(func_get_arg(1));
         $this->sqlBuilder->setGroup($columns);
     } else {
         call_user_func_array(array($this->sqlBuilder, 'setGroup'), func_get_args());
     }
     return $this;
 }