Nette\Database\Table\Selection::offsetSet PHP Method

    public function offsetSet($key, $value)
    {
        $this->execute();
        $this->rows[$key] = $value;
    }

 /**
  * Mimic row.
  *
  * @param mixed $key Row's primary key
  * @param Nette\Database\Table\IRow $value
  * @return void
  */
 public function offsetSet($key, $value)
 {
     $this->selection->offsetSet($key, $value);
 }