This PHPStorm Plugin can be used to display psalm baseline errors of a file as warning.
It also comes with support of removing the baseline errors for the specific file as a fix for those warnings.
-
Using IDE built-in plugin system:
Settings/Preferences > Plugins > Marketplace > Search for "idea-psalm-baseline" > Install Plugin
-
Manually:
Download the latest release and install it manually using Settings/Preferences > Plugins > ⚙️ > Install plugin from disk...