def attach_classic_link_instance(options = {})
      options = options.merge(vpc_id: @id)
      resp = @client.attach_classic_link_vpc(options)
      resp.data
    end
def attach_classic_link_instance(options = {})
      options = options.merge(vpc_id: @id)
      resp = @client.attach_classic_link_vpc(options)
      resp.data
    end
@example Request syntax with placeholder values

   vpc.attach_classic_link_instance({
     dry_run: false,
     groups: ["String"], # required
     instance_id: "String", # required
   })
 @param [Hash] options ({})
 @option options [Boolean] :dry_run
   Checks whether you have the required permissions for the action,
   without actually making the request, and provides an error response.
   If you have the required permissions, the error response is
   `DryRunOperation`. Otherwise, it is `UnauthorizedOperation`.
 @option options [required, Array<String>] :groups
   The ID of one or more of the VPC's security groups. You cannot
   specify security groups from a different VPC.
 @option options [required, String] :instance_id
   The ID of an EC2-Classic instance to link to the ClassicLink-enabled
   VPC.
 @return [Types::AttachClassicLinkVpcResult]