instance method process

# File activestorage/lib/active_storage/transformers/mini_magick_transformer.rb, line 9
        def process(file, format:)
          image = MiniMagick::Image.new(file.path, file)

          transformations.each do |name, argument_or_subtransformations|
            image.mogrify do |command|
              if name.to_s == "combine_options"
                argument_or_subtransformations.each do |subtransformation_name, subtransformation_argument|
                  pass_transform_argument(command, subtransformation_name, subtransformation_argument)
                end
              else
                pass_transform_argument(command, name, argument_or_subtransformations)
              end
            end
          end

          image.format(format) if format

          image.tempfile.tap(&:open)
        end