/** * @param int $initiatorId * @param int $interlocutorId * @throws InvalidArgumentException * @return array<MAILBOX_BOL_Conversation> */ public function findConversationList($initiatorId, $interlocutorId) { if (empty($initiatorId) || !isset($interlocutorId)) { throw new InvalidArgumentException("Not numeric params were provided! Numbers are expected!"); } return $this->conversationDao->findConversationList($initiatorId, $interlocutorId); }