function getConversationMailIds($check_permissions = false){ if ($check_permissions) { if (is_null($this->mail_conversation_mail_ids_w_permissions)) { $this->mail_conversation_mail_ids_w_permissions = MailContents::getMailIdsFromConversation($this, true); } return $this->mail_conversation_mail_ids_w_permissions; } else { if (is_null($this->mail_conversation_mail_ids)) { $this->mail_conversation_mail_ids = MailContents::getMailIdsFromConversation($this); } return $this->mail_conversation_mail_ids; } }