/// <summary>
/// Creates a virtual wan vpn gateway if it doesn't exist else updates the
/// existing 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='vpnGatewayParameters'>
/// Parameters supplied to create or Update a virtual wan vpn gateway.
/// </param>
public static VpnGateway CreateOrUpdate(this IVpnGatewaysOperations operations, string resourceGroupName, string gatewayName, VpnGateway vpnGatewayParameters)
{
return(operations.CreateOrUpdateAsync(resourceGroupName, gatewayName, vpnGatewayParameters).GetAwaiter().GetResult());
}