case "MUTUAL":
				out.Mode = istio.ServerTLSSettings_MUTUAL
			case "ISTIO_MUTUAL":
				out.Mode = istio.ServerTLSSettings_ISTIO_MUTUAL
				return out, nil
			}
		}
		if len(tls.CertificateRefs) != 1 {
			// This is required in the API, should be rejected in validation
			return out, &ConfigError{Reason: InvalidTLS, Message: "exactly 1 certificateRefs should be present for TLS termination"}
		}