Moose and Squirrel are THE BEST FRIENDS, but if Moose isnt there
Squirrel will hang out with Mouse as well.
When your own code doesnt actually care whether or not you use Moose or
Mouse you can use either, and let your users decide for you.
This lets you run with minimal dependencies and have a faster startup, but if
Moose is already in use you get all the benefits of using that
(transformability, introspection, more opportunities for code reuse, etc).