Flutter package template doesn't have example folder

[jaumard]

When I choose new flutter project -> Flutter package, I getting a template for the package and tests, but it doesn't contain anything about an example app. From the description Select package when creating a pure Dart component, like a new Widget so if I'm creating a new widget, I would like to have an example app to at least test it during development.
Might worth having a checkbox generate example app that will generate it for us if it's not by default

[terrylucas]

Duplicate of #2975

I think a subclass widget would be a great idea I'll add it to the original bug. Thanks.