/// <summary>
 /// Activates a reserved invoice.
 /// </summary>
 public ActivateInvoiceResponseType ActivateInvoice(ActivateInvoiceRequestType request)
 {
     request.ThrowIfNull();
     return(_client.ActivateInvoice(request));
 }
 /// <summary>
 /// Activates a reserved invoice.
 /// </summary>
 public ActivateInvoiceResponseType ActivateInvoice(ActivateInvoiceRequestType request)
 {
     request.ThrowIfNull();
     return _client.ActivateInvoice(request);
 }