# File lib/fog/aws/requests/auto_scaling/attach_instances.rb, line 24
        def attach_instances(auto_scaling_group_name, options = {})

          if instance_ids = options.delete('InstanceIds')
            options.merge!(AWS.indexed_param('InstanceIds.member.%d', [*instance_ids]))
          end

          request({
            'Action'               => 'AttachInstances',
            'AutoScalingGroupName' => auto_scaling_group_name,
            :parser                => Fog::Parsers::AWS::AutoScaling::Basic.new
          }.merge!(options))
        end