/// <summary>
 /// Deletes a virtual wan vpn gateway.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='resourceGroupName'>
 /// The resource group name of the VpnGateway.
 /// </param>
 /// <param name='gatewayName'>
 /// The name of the gateway.
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task BeginDeleteAsync(this IVpnGatewaysOperations operations, string resourceGroupName, string gatewayName, CancellationToken cancellationToken = default(CancellationToken))
 {
     (await operations.BeginDeleteWithHttpMessagesAsync(resourceGroupName, gatewayName, null, cancellationToken).ConfigureAwait(false)).Dispose();
 }