/// <summary>
 /// Gets the list of past recommendations optionally specified by the time
 /// range.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='resourceGroupName'>
 /// Resource group name
 /// </param>
 /// <param name='siteName'>
 /// Site name
 /// </param>
 /// <param name='startTime'>
 /// The start time of a time range to query, e.g. $filter=startTime eq
 /// '2015-01-01T00:00:00Z' and endTime eq '2015-01-02T00:00:00Z'
 /// </param>
 /// <param name='endTime'>
 /// The end time of a time range to query, e.g. $filter=startTime eq
 /// '2015-01-01T00:00:00Z' and endTime eq '2015-01-02T00:00:00Z'
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <IList <Recommendation> > GetRecommendationHistoryForSiteAsync(this IRecommendationsOperations operations, string resourceGroupName, string siteName, string startTime = default(string), string endTime = default(string), CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.GetRecommendationHistoryForSiteWithHttpMessagesAsync(resourceGroupName, siteName, startTime, endTime, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }