@Override
    public void disconnect() {
        try {
            connectionManager.closeConnection(RPC_CLIENT, transportConfig, url);
        } catch (SofaRpcRuntimeException e) {
            throw e;
        } catch (Exception e) {
            throw new SofaRpcRuntimeException(LogCodes.getLog(LogCodes.ERROR_CLOSE_CONNECTION), e);
        }
    }
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