Also androidx is replacing the Android Support library so it's best to use this one
According to https://developer.android.com/jetpack/androidx
AndroidX is a major improvement to the original Android Support Library, which is no longer maintained. androidx packages fully replace the Support Library by providing feature parity and new libraries.
AndroidX replaces the original support library APIs with packages in the androidx namespace. Only the package and Maven artifact names changed; class, method, and field names did not change.
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