"alias_method_chain" Rails 5 deprecation warning

[mahemoff]

I'm seeing this deprecation warning while upgrading to Rails 5:

DEPRECATION WARNING: alias_method_chain is deprecated. Please, use Module#prepend instead. From module, you can access the original method using super. (called from block in module:MultiFetchFragments at /home/project/vendor/cache/multi_fetch_fragments-59612d54fc3f/lib/multi_fetch_fragments.rb:5)

[mahemoff]

I just realised this gem is being pulled into Rails 5, which might make the issue moot. It doesn't seem 100% done yet though.