Add String method to all interfaces

client/client.go

@@ -35,6 +35,7 @@ type Client interface {
 	Stream(ctx context.Context, req Request, opts ...CallOption) (Streamer, error)
 	StreamRemote(ctx context.Context, addr string, req Request, opts ...CallOption) (Streamer, error)
 	Publish(ctx context.Context, p Publication, opts ...PublishOption) error
+	String() string
 }
 
 type Publication interface {
@@ -122,3 +123,7 @@ func NewProtoRequest(service, method string, request interface{}, reqOpts ...Req
 func NewJsonRequest(service, method string, request interface{}, reqOpts ...RequestOption) Request {
 	return DefaultClient.NewJsonRequest(service, method, request, reqOpts...)
 }
+
+func String() string {
+	return DefaultClient.String()
+}

client/rpc_client.go

@@ -258,3 +258,7 @@ func (r *rpcClient) NewProtoRequest(service, method string, request interface{},
 func (r *rpcClient) NewJsonRequest(service, method string, request interface{}, reqOpts ...RequestOption) Request {
 	return newRpcRequest(service, method, request, "application/json", reqOpts...)
 }
+
+func (r *rpcClient) String() string {
+	return "rpc"
+}