@Override
    public void close() {
        this.channel.shutdown();
    }
Grpc call.

@param callParams callParams
@return ListenableFuture future
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-grpc/src/main/java/org/apache/shenyu/plugin/grpc/client/ShenyuGrpcClient.java