• Android Studio version: Android Studio Bumblebee | 2021.1.1 Patch 1 (Build #AI-211.7628.21.2111.8139111)
• Timber version: com.jakewharton.timber:timber:5.0.1

Reproduction steps:

1. Simply add the above dependency to an Android project (ensuring to use Android Studio Bumblebee+)
2. Observe the Cannot resolve method 'plant(timber.log.Timber.DebugTree)' Lint error message:

Additional notes:

• Didn't seem to occur on prior version of Android Studio (Arctic Fox and prior).
• Does seem to affect Android Studio Bumblebee (Stable), Chipmunk (Beta) and Dolphin (Canary).
• Doesn't appear to occur with pre-5.0.0 versions of Timber.
• Loosely related to this issue.
• Could be an Android Studio bug rather than a bug with Timber, though I figured best to report it here as it doesn't seem to affect pre-5.0.0 versions of Timber as mentioned previously.
• In case the issue is in fact with Android Studio, @gmk57 has reported it on Android Studio bug tracker.