https://github.com/shrinerb/shrine/blob/267fdd413898ca90eec242a71684f906f2d1d1bf/lib/shrine.rb https://github.com/shrinerb/shrine/blob/34e6db03cd43d92c21ae20bb5c63f529080d27f2/lib/shrine/plugins.rb https://github.com/shrinerb/shrine/blob/master/lib/shrine/plugins/processing.rb