transformer

# File activestorage/app/models/active_storage/variation.rb, line 62
    def transformer
      if ActiveStorage.variant_processor
        begin
          require "image_processing"
        rescue LoadError
          ActiveSupport::Deprecation.warn <<~WARNING.squish
            Generating image variants will require the image_processing gem in Rails 6.1.
            Please add `gem 'image_processing', '~> 1.2'` to your Gemfile.
          WARNING

          ActiveStorage::Transformers::MiniMagickTransformer.new(transformations)
        else
          ActiveStorage::Transformers::ImageProcessingTransformer.new(transformations)
        end
      else
        ActiveStorage::Transformers::MiniMagickTransformer.new(transformations)
      end
    end