Thanks for your pull request.

It looks like this may be your first contribution to a Google open source project, in which case you'll need to sign a Contributor License Agreement (CLA) at https://cla.developers.google.com/.

If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check the information on your CLA or see this help article on setting the email on your git commits.

Once you've done that, please reply here to let us know. If you signed the CLA as a corporation, please let us know the company's name.

Thanks for the pointer (and the library) @huangqg! LGTM, when you have time, can you sign the CLA and we'll get this merged.

Hi @vmarmol, I already signed the CLA.

Thanks @huangqg! Merging.