Comment 4 for bug 1729754

Bits of IRC discussion with Will Grant about this:

<ePierre> wgrant, so yeah, my question is: I don't understand where to find the source code for the `addAttachment` method
<ePierre> wgrant, when I grep in launchpadlib source code, I don't see anything other than in testing/launchpad-wadl.xml
<wgrant> ePierre: sorry, was afk for a bit. launchpadlib uses lazr.restfulclient to parse Launchpad's WADL API description, so we can make changes to the API without having to roll out a new launchpadlib everywhere.
<wgrant> ePierre: lazr.restfulclient's NamedOperation.__call__ is probably interesting
<ePierre> wgrant, where can I find lazr.restfulclient's source code?
<wgrant> ePierre: lp:lazr.restfulclient