# File lib/fog/aws/requests/auto_scaling/describe_auto_scaling_instances.rb, line 59
        def describe_auto_scaling_instances(options = {})
          if instance_ids = options.delete('InstanceIds')
            options.merge!(AWS.indexed_param('InstanceIds.member.%d', [*instance_ids]))
          end
          request({
            'Action' => 'DescribeAutoScalingInstances',
            :parser  => Fog::Parsers::AWS::AutoScaling::DescribeAutoScalingInstances.new
          }.merge!(options))
        end