Official Description: Standalone efficient collections.

CommonsWare’s Notes

This artifact contains library implementations of a series of collection classes that are also in the framework, such as LruCache and ArrayMap. For those, use the library if:

This artifact also has a few classes that are not in the framework, such as CircularArray and CircularIntArray. If those classes are of interest to you, you will need this artifact. Note that depending on your other dependencies, you might get this one “for free” without Gradle modifications.