code: @Override
      public DetachClassicLinkVpcResult detachClassicLinkVpc(DetachClassicLinkVpcRequest request) {
          request = beforeClientExecution(request);
          return executeDetachClassicLinkVpc(request);
      }
docs: <p>
  Unlinks (detaches) a linked EC2-Classic instance from a VPC. After the instance has been unlinked, the VPC
  security groups are no longer associated with it. An instance is automatically unlinked from a VPC when it's
  stopped.
  </p>
  
  @param detachClassicLinkVpcRequest
  @return Result of the DetachClassicLinkVpc operation returned by the service.
  @sample AmazonEC2.DetachClassicLinkVpc
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/DetachClassicLinkVpc" target="_top">AWS API
  Documentation</a>