ygnmi.Update fails when updating string leaf with string value

[zhang-guodong]

I'm trying to use ygnmi.Update to update a string leaf in the configuration, like this:

path := exampleocpath.Root().Parent().Child().Config().One()
_, err := ygnmi.Update(context.Background(), c.client, path.ConfigQuery, "10")

However, the gNMI server returns the following error:

Update(t) at path origin:"openconfig" elem:{name:"parent"} elem:{name:"child"} elem:{name:"config"} elem:{name:"one"}: rpc error: code = Internal desc = error in creating config struct from IETF JSON data: got map[string]interface {} type for field one, expect string

Questions:

• Is this the correct way to update a string leaf using ygnmi.Update?
• Am I missing a required step or configuration?

Any guidance would be greatly appreciated. Thank you!