The undocumented HttpStatusPushBase class has been deprecated in buildbot > 2.x

[noj]

Python version: 3.6.8
Buildbot version: 3.1.0
Twisted version: 21.2.0

Looking at https://github.com/buildbot/buildbot/blob/master/master/docs/relnotes/2.x.rst we can see this:

The undocumented HttpStatusPushBase class has been deprecated. Please use ReporterBase directly.

The send method of the reporters based on HttpStatusPushBase has been deprecated. This affects only users who implemented custom reporters that directly or indirectly derive HttpStatusPushBase. Please use sendMessage as the replacement. The following reporters have been affected:

HttpStatusPush
BitbucketStatusPush
BitbucketServerStatusPush
BitbucketServerCoreAPIStatusPush
GerritVerifyStatusPush
GitHubStatusPush
GitLabStatusPush
HipChatStatusPush
ZulipStatusPush

[zplizzi]

This looks to have been not only deprecated but entirely removed by at least buildbot 3.0.2. When trying to use this plugin buildbot throws this error on launch:

builtins.AttributeError: Unable to load buildbot.reporters:SlackStatusPush: module 'buildbot.reporters.http' has no attribute 'HttpStatusPushBase'