public async Task <Response <VpnConnection> > GetAsync(string resourceGroupName, string gatewayName, string connectionName, CancellationToken cancellationToken = default)
        {
            if (resourceGroupName == null)
            {
                throw new ArgumentNullException(nameof(resourceGroupName));
            }
            if (gatewayName == null)
            {
                throw new ArgumentNullException(nameof(gatewayName));
            }
            if (connectionName == null)
            {
                throw new ArgumentNullException(nameof(connectionName));
            }

            using var message = CreateGetRequest(resourceGroupName, gatewayName, connectionName);
            await _pipeline.SendAsync(message, cancellationToken).ConfigureAwait(false);

            switch (message.Response.Status)
            {
            case 200:
            {
                VpnConnection value = default;
                using var document = await JsonDocument.ParseAsync(message.Response.ContentStream, default, cancellationToken).ConfigureAwait(false);

                value = VpnConnection.DeserializeVpnConnection(document.RootElement);
                return(Response.FromValue(value, message.Response));
            }
        public virtual VpnConnectionsCreateOrUpdateOperation StartCreateOrUpdate(string resourceGroupName, string gatewayName, string connectionName, VpnConnection vpnConnectionParameters, CancellationToken cancellationToken = default)
        {
            if (resourceGroupName == null)
            {
                throw new ArgumentNullException(nameof(resourceGroupName));
            }
            if (gatewayName == null)
            {
                throw new ArgumentNullException(nameof(gatewayName));
            }
            if (connectionName == null)
            {
                throw new ArgumentNullException(nameof(connectionName));
            }
            if (vpnConnectionParameters == null)
            {
                throw new ArgumentNullException(nameof(vpnConnectionParameters));
            }

            using var scope = _clientDiagnostics.CreateScope("VpnConnectionsOperations.StartCreateOrUpdate");
            scope.Start();
            try
            {
                var originalResponse = RestClient.CreateOrUpdate(resourceGroupName, gatewayName, connectionName, vpnConnectionParameters, cancellationToken);
                return(new VpnConnectionsCreateOrUpdateOperation(_clientDiagnostics, _pipeline, RestClient.CreateCreateOrUpdateRequest(resourceGroupName, gatewayName, connectionName, vpnConnectionParameters).Request, originalResponse));
            }
            catch (Exception e)
            {
                scope.Failed(e);
                throw;
            }
        }