Expose the GPluginManager class

Review Request #689 — Created May 31, 2021 and submitted — Latest diff uploaded

Information

gplugin/gplugin
default
08b937449340

Reviewers

This is the first step in converting to the manager paradigm we've been using
in pidgin.

Ran the unit tests. This currently breaks the vapi bindings for the manager, but nothing is using them right now so it's okay and will be fixed in a follow up pull request.