/// <summary>Snippet for ExportEntitiesAsync</summary>
        public async Task ExportEntitiesRequestObjectAsync()
        {
            // Snippet: ExportEntitiesAsync(ExportEntitiesRequest, CallSettings)
            // Additional: ExportEntitiesAsync(ExportEntitiesRequest, CancellationToken)
            // Create client
            DatastoreAdminClient datastoreAdminClient = await DatastoreAdminClient.CreateAsync();

            // Initialize request argument(s)
            ExportEntitiesRequest request = new ExportEntitiesRequest
            {
                ProjectId       = "",
                Labels          = { { "", "" }, },
                EntityFilter    = new EntityFilter(),
                OutputUrlPrefix = "",
            };
            // Make the request
            Operation <ExportEntitiesResponse, ExportEntitiesMetadata> response = await datastoreAdminClient.ExportEntitiesAsync(request);

            // Poll until the returned long-running operation is complete
            Operation <ExportEntitiesResponse, ExportEntitiesMetadata> completedResponse = await response.PollUntilCompletedAsync();

            // Retrieve the operation result
            ExportEntitiesResponse result = completedResponse.Result;

            // Or get the name of the operation
            string operationName = response.Name;
            // This name can be stored, then the long-running operation retrieved later by name
            Operation <ExportEntitiesResponse, ExportEntitiesMetadata> retrievedResponse = await datastoreAdminClient.PollOnceExportEntitiesAsync(operationName);

            // Check if the retrieved long-running operation has completed
            if (retrievedResponse.IsCompleted)
            {
                // If it has completed, then access the result
                ExportEntitiesResponse retrievedResult = retrievedResponse.Result;
            }
            // End snippet
        }