/// <summary>
 /// Creates a new phraselist feature.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='azureRegion'>
 /// Supported Azure regions for Cognitive Services endpoints. Possible values
 /// include: 'westus', 'westeurope'
 /// </param>
 /// <param name='appId'>
 /// Format - guid. The application ID.
 /// </param>
 /// <param name='versionId'>
 /// The version ID of the task.
 /// </param>
 /// <param name='phraselistCreateObject'>
 /// A JSON object containing Name, comma-separated Phrases and the
 /// isExchangeable boolean.            Default value for isExchangeable is
 /// true.
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <double?> CreatePhraselistFeatureAsync(this IFeatures operations, AzureRegions azureRegion, string appId, string versionId, PhraselistCreateObject phraselistCreateObject = default(PhraselistCreateObject), CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.CreatePhraselistFeatureWithHttpMessagesAsync(azureRegion, appId, versionId, phraselistCreateObject, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }