/// <summary>
 /// Creates a new operation in the API or updates an existing one.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='resourceGroupName'>
 /// The name of the resource group.
 /// </param>
 /// <param name='serviceName'>
 /// The name of the API Management service.
 /// </param>
 /// <param name='apiId'>
 /// API revision identifier. Must be unique in the current API Management
 /// service instance. Non-current revision has ;rev=n as a suffix where n is
 /// the revision number.
 /// </param>
 /// <param name='operationId'>
 /// Operation identifier within an API. Must be unique in the current API
 /// Management service instance.
 /// </param>
 /// <param name='parameters'>
 /// Create parameters.
 /// </param>
 /// <param name='ifMatch'>
 /// ETag of the Entity. Not required when creating an entity, but required when
 /// updating an entity.
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <OperationContract> CreateOrUpdateAsync(this IApiOperationOperations operations, string resourceGroupName, string serviceName, string apiId, string operationId, OperationContract parameters, string ifMatch = default(string), CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.CreateOrUpdateWithHttpMessagesAsync(resourceGroupName, serviceName, apiId, operationId, parameters, ifMatch, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }