code: func ParseCSRFile(csrFile string) (*x509.CertificateRequest, error) {
  	csrPEM, err := ioutil.ReadFile(csrFile)
  	if err != nil {
  		return nil, err
  	}
  
  	return ParseCSRPEM(csrPEM)
  }
docs: // ParseCSRFile uses the helper to parse an x509 CSR PEM file.