API for plugin interoperability?

Hi @seebeen! Does Letter Avatars have a defined API (functions, filter hooks, or even just a way to get the various class instances)? I’d like to make Avatar Privacy work more nicely with your plugin, but it seems all I can do is deactivate Letter Avatars completely by overriding the pre_get_avatar filter to return null again, as you are otherwise bypassing get_avatar() entirely (most avatar-related plugins hook into (pre_)get_avatar_data instead and leave the markup construction alone).

The page I need help with: [log in to see the link]