code: func NewCSRCleanerController(
  	csrClient csrclient.CertificateSigningRequestInterface,
  	csrInformer certificatesinformers.CertificateSigningRequestInformer,
  ) *CSRCleanerController {
  	return &CSRCleanerController{
  		csrClient: csrClient,
  		csrLister: csrInformer.Lister(),
  	}
  }
docs: // NewCSRCleanerController creates a new CSRCleanerController.