# File lib/aws/simple_db/put_attributes.rb, line 44
      def do_put attribute_hashes, expect_opts = {}
        return nil if attribute_hashes.empty?

        opts = {
          :domain_name => item.domain.name,
          :item_name => item.name,
          :attributes => attribute_hashes,
          :expected => expect_condition_opts(expect_opts)
        }
        opts.delete(:expected) if opts[:expected].empty?

        client.put_attributes(opts)
        nil
      end