public static LogCollector<ShenyuRequestLog> getInstance() {
        return INSTANCE;
    }
get LogCollector instance.

@return LogCollector instance
shenyu-plugin/shenyu-plugin-logging/shenyu-plugin-logging-rocketmq/src/main/java/org/apache/shenyu/plugin/logging/rocketmq/collector/RocketMQLogCollector.java