# File lib/fog/aws/requests/compute/attach_classic_link_vpc.rb, line 21
        def attach_classic_link_vpc(instance_id, vpc_id, security_group_ids, dry_run=false)
          request({
            'Action'    => 'AttachClassicLinkVpc',
            'VpcId'     => vpc_id,
            'InstanceId'=> instance_id,
            'DryRun'    => dry_run,
            :parser     => Fog::Parsers::Compute::AWS::Basic.new
          }.merge(Fog::AWS.indexed_param('SecurityGroupId', security_group_ids)))

        end