Now that we have gone over to implementations for a couple of different iterations, I want you to take
some time to implement the mutable iterator known as Editor Mute.
As you might have noticed when we were implementing these two iterations in their set up is very similar.
So the same will hold true for our mutable iterator.
Don't forget you need to pass in a parameter here, a return type, and then add in your code down here
as well as creating your struct and then also implementing in the editor trait for or mute.
So take some time to give this a whirl.
And then in the next lecture we will go over my solution.