code: public X509Certificate getRootCaCertificate() {
  		try {
  			return (X509Certificate) getRootCA();
  		} catch (KeyStoreException e) {
  			logger.error("Couldn't get ZAP's Root CA Certificate", e);
  			return null;
  		}
  	}
docs: Gets ZAPs current Root CA Certificate in X.509 format.
  Could return {@code null} if there is a problem getting the certificate.
  
  @return The X.509 version of ZAPs current Root CA certificate.
  @since 2.7.0