public function execute(HTTPRequestCustom $request)
 {
     $this->module_id = $request->get_poststring('module_id', '');
     $this->id_in_module = $request->get_poststring('id_in_module', '');
     $this->topic_identifier = $request->get_poststring('topic_identifier', '');
     $this->provider = CommentsProvidersService::get_provider($this->module_id, $this->topic_identifier);
     $this->provider->set_id_in_module($this->id_in_module);
 }