An in-memory backend for Refile.
This probably isn't super useful, but it serves as an illustration on how to write backends for Refile.
Add this line to your application's Gemfile:
gem 'refile-memory'
Set up Refile to use the memory backend:
Refile.configure do |config|
config.cache = Refile::Memory::Backend.new
config.store = Refile::Memory::Backend.new
end