transform_blob

# File activestorage/app/models/active_storage/variant_with_record.rb, line 47
    def transform_blob
      blob.open do |input|
        variation.transform(input) do |output|
          yield io: output, filename: "#{blob.filename.base}.#{variation.format.downcase}",
            content_type: variation.content_type, service_name: blob.service.name
        end
      end
    end