def attach(options = {})
      options = Aws::Util.deep_merge(options,
        auto_scaling_group_name: @group_name,
        instance_ids: [@id]
      )
      resp = @client.attach_instances(options)
      resp.data
    end
def attach(options = {})
      options = Aws::Util.deep_merge(options,
        auto_scaling_group_name: @group_name,
        instance_ids: [@id]
      )
      resp = @client.attach_instances(options)
      resp.data
    end
@!group Actions
 @example Request syntax with placeholder values

   instance.attach()
 @param [Hash] options ({})
 @return [EmptyStructure]