/// <summary>
 /// List all backends.
 /// </summary>
 /// <param name='operations'>
 /// Reference to the
 /// Microsoft.Azure.Management.ApiManagement.IBackendOperations.
 /// </param>
 /// <param name='resourceGroupName'>
 /// Required. The name of the resource group.
 /// </param>
 /// <param name='serviceName'>
 /// Required. The name of the Api Management service.
 /// </param>
 /// <param name='query'>
 /// Optional.
 /// </param>
 /// <returns>
 /// List Backend operation response details.
 /// </returns>
 public static Task <BackendListResponse> ListAsync(this IBackendOperations operations, string resourceGroupName, string serviceName, QueryParameters query)
 {
     return(operations.ListAsync(resourceGroupName, serviceName, query, CancellationToken.None));
 }