Flutter: 'package get' has not been run; &

Question

I dowloaded a Flutter sample code for Catalog from git, which showing me a warning,

'package get' has not been run
'Pub get' has not been run

What does it mean? How to solve it? Should I ignore this warnings or Update dependencies as suggested with links in warning?

Answer 1

The banner 'Pub get' has not been run did not disappear even after I clicked Get dependencies and Upgrade dependencies.

Then, after I closed Android Studio and opened the same project again, the banner disappeared.