@Override
    public void closeConnection(final Endpoint endpoint) {
        Requires.requireNonNull(endpoint, "endpoint");
        this.rpcClient.closeConnection(endpoint.toString());
    }
Bolt rpc client impl.

@author jiachun.fjc
jraft-core/src/main/java/com/alipay/sofa/jraft/rpc/impl/BoltRpcClient.java