# File lib/aws/dynamo_db/batch_write.rb, line 174
      def format_delete keys

        keys = [keys] unless keys.is_a?(Array)

        item = {}
        item[:hash_key_element] = format_attribute_value(keys.first)
        item[:range_key_element] = format_attribute_value(keys.last) if
          keys.count > 1

        item

      end