We would like to supply fixes that can change a class name based on the method being called.

For example:

Scaffold.of(context).showSnackBar(SnackBar(content: Text('Snack')));

should be migrated to

ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Snack')));

The is not specific to the same method being moved across classes, as we would want to be able to identify and compose fixes that can feasibly migrate classA.methodA to classB.methodB, or constructors too.

Another example of this would be going from this:

BlackListingTextInputFormatter()

to this:

FilteringTextInputFormatter.deny()

Not sure if that example should be a different use case, if so we can break it out into a separate issue.