code: func verifySandboxStatus(status *runtimeapi.PodSandboxStatus) error {
  	if status.Id == "" {
  		return fmt.Errorf("Id is not set")
  	}
  
  	if status.Metadata == nil {
  		return fmt.Errorf("Metadata is not set")
  	}
  
  	metadata := status.Metadata
  	if metadata.Name == "" || metadata.Namespace == "" || metadata.Uid == "" {
  		return fmt.Errorf("Name, Namespace or Uid is not in metadata %q", metadata)
  	}
  
  	if status.CreatedAt == 0 {
  		return fmt.Errorf("CreatedAt is not set")
  	}
  
  	return nil
  }
docs: // verifySandboxStatus verified whether all required fields are set in PodSandboxStatus.