public ConcurrentHashMap<String, TimeoutInfo> getBrokerRegMap() {
        return brokerRegMap;
    }
Get the map of broker which consists of the key of nodes and the timeout info of nodes

@return the map of timeout info of brokers' nodes.
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/common/heartbeat/HeartbeatManager.java