protected function parametres()
{
$parametres = new Parameters();
$parametres->add(T_Chat::id_sender, $this->chat->id_sender);
$parametres->add(T_Chat::id_recipients, $this->chat->id_recipients);
$parametres->add(T_Chat::msg, $this->chat->msg);
$parametres->add(T_Chat::time_msg, $this->chat->time_msg);
return $parametres;
}