Snackbar package in AndroidX

This took a long time to resolve, as until your project successfully builds, autocomplete will not function to lookup packages.

The correct package to use is:

com.google.android.material.snackbar.Snackbar

It is also important to remember to change this on the XML tags as well as the imports if the migration has not worked successfully.

Old build artifact com.android.support:design now solves in com.google.android.material:material:1.0.0 for AndroidX build artifact.