Should have an EnumAsMutGetters

[TheDan64]

In case you want to get a mutable reference you should also be able to do enum.as_mut_foo()

[webbrain-one]

Hi! Thanks for the suggestion. I've opened PR #20 to address this. It adds the EnumAsMutGetters feature, which allows you to get mutable references using methods like enum.as_mut_foo().

Let me know if you have any feedback!