@Override
    public boolean isAvailable() {
        return connectionManager.isConnectionFine(RPC_CLIENT, transportConfig, url);
    }
For convert provider to bolt url.

@param transportConfig ClientTransportConfig
@param providerInfo    ProviderInfo
@return Bolt Url
remoting/remoting-bolt/src/main/java/com/alipay/sofa/rpc/transport/bolt/BoltClientTransport.java