code: func NewCSRApprovingController(client clientset.Interface, csrInformer certificatesinformers.CertificateSigningRequestInformer) *certificates.CertificateController {
  	approver := &sarApprover{
  		client:      client,
  		recognizers: recognizers(),
  	}
  	return certificates.NewCertificateController(
  		client,
  		csrInformer,
  		approver.handle,
  	)
  }
docs: // NewCSRApprovingController creates a new CSRApprovingController.