How to define an alias in fish shell?

Question

I would like to define some aliases in fish. Apparently it should be possible to define them in

~/.config/fish/functions

but they don\'t g

Answer 1

This is how I define a new function foo, run it, and save it persistently.

sthorne@pearl~> function foo
                    echo 'foo was here'
                end
sthorne@pearl~> foo
foo was here
sthorne@pearl~> funcsave foo