code: func (v *Vendorer) walkGenerated() error {
  	if !v.cfg.K8sOpenAPIGen {
  		return nil
  	}
  	v.managedAttrs = append(v.managedAttrs, "openapi_targets", "vendor_targets")
  	paths, err := v.findOpenAPI(v.root)
  	if err != nil {
  		return err
  	}
  	return v.addGeneratedOpenAPIRule(paths)
  }
docs: // walkGenerated updates the rule for kubernetes' OpenAPI generated file.
  // This involves reading all go files in the source tree and looking for the
  // "+k8s:openapi-gen" tag. If present, then that package must be supplied to
  // the genrule.