@Override
        public String toString() {
            return "Notification{"
                    + "forwardToRequesterOtherOnlineSessions="
                    + forwardToRequesterOtherOnlineSessions
                    + ", recipients="
                    + recipients
                    + ", notification="
                    + ProtoFormatter.toLogString(notification)
                    + '}';
        }
@param code          The status code of the response.
@param reason        The reason of the response.
@param response      The response to be sent to the requester.
@param notifications The notifications to be sent to users.
@author James Chen
turms-service/src/main/java/im/turms/service/access/servicerequest/dto/RequestHandlerResult.java