@Override
    public void connectionClosed(SessionProtocol protocol,
                                 InetSocketAddress remoteAddr,
                                 InetSocketAddress localAddr,
                                 AttributeMap attrs) throws Exception {
        unwrap().connectionClosed(protocol, remoteAddr, localAddr, attrs);
    }
Creates a new instance with the specified {@code delegate}.
core/src/main/java/com/linecorp/armeria/client/ConnectionPoolListenerWrapper.java