public Boolean inCache(final String selectorName) {
        return cache.containsKey(selectorName);
    }
inCache.

@param selectorName selectorName
@return is selectorName has been cached
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-tcp/src/main/java/org/apache/shenyu/plugin/tcp/handler/TcpBootstrapFactory.java