enumerator.rb

        enumerator = self.dynamo_db_table.items.query(options)
        # this enumerator returns some proxy objects and can be used like so

        enumerator.each do |item|
            # do something with item, convert it into real item
            data = item.attributes.to_h

            obj = self.new(:shard => table)
            obj.send(:hydrate, id, data)
            # Now do something with obj
            obj
        end

        # I'd like to wrap enumerator so I can do
        enumerator.each do |obj|
            # no conversion needed, the above code has already been called
        end

        # This can be achieved with the following code

        result = []

        enumerator.each do |item|
            # do something with item, convert it into real item
            data = item.attributes.to_h

            obj = self.new(:shard => table)
            obj.send(:hydrate, id, data)
            # Now do something with obj
            result << obj
        end

        return result
        # But this code is not lazy, I don't want to populate an array, I want
        # to wrap the unerlying enumerator