Can admin_bar_menu or another action be used to modify the admin bar on the admin side?

Blush… the answer turned out to be a bit obvious…

The function error_log() was writing to two different logs on my system. One log was showing the errors when on user-facing pages, another log was showing errors on admin pages.

The plugin was working just fine, but I was not looking at the admin error log. Oops!

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