toError

        pub fn toError(description: Description) Error!void {
            switch (description) {
                .close_notify => {}, // not an error
                .unexpected_message => return error.TlsAlertUnexpectedMessage,
                .bad_record_mac => return error.TlsAlertBadRecordMac,
                .record_overflow => return error.TlsAlertRecordOverflow,
                .handshake_failure => return error.TlsAlertHandshakeFailure,
                .bad_certificate => return error.TlsAlertBadCertificate,
                .unsupported_certificate => return error.TlsAlertUnsupportedCertificate,
                .certificate_revoked => return error.TlsAlertCertificateRevoked,
                .certificate_expired => return error.TlsAlertCertificateExpired,
                .certificate_unknown => return error.TlsAlertCertificateUnknown,
                .illegal_parameter => return error.TlsAlertIllegalParameter,
                .unknown_ca => return error.TlsAlertUnknownCa,
                .access_denied => return error.TlsAlertAccessDenied,
                .decode_error => return error.TlsAlertDecodeError,
                .decrypt_error => return error.TlsAlertDecryptError,
                .protocol_version => return error.TlsAlertProtocolVersion,
                .insufficient_security => return error.TlsAlertInsufficientSecurity,
                .internal_error => return error.TlsAlertInternalError,
                .inappropriate_fallback => return error.TlsAlertInappropriateFallback,
                .user_canceled => {}, // not an error
                .missing_extension => return error.TlsAlertMissingExtension,
                .unsupported_extension => return error.TlsAlertUnsupportedExtension,
                .unrecognized_name => return error.TlsAlertUnrecognizedName,
                .bad_certificate_status_response => return error.TlsAlertBadCertificateStatusResponse,
                .unknown_psk_identity => return error.TlsAlertUnknownPskIdentity,
                .certificate_required => return error.TlsAlertCertificateRequired,
                .no_application_protocol => return error.TlsAlertNoApplicationProtocol,
                _ => return error.TlsAlertUnknown,
            }
        }