reserveIds method
      
Future<ReserveIdsResponse> 
reserveIds(
    
- ReserveIdsRequest request,
 - String projectId, {
 - String? $fields,
 
Prevents the supplied keys' IDs from being auto-allocated by Cloud Datastore.
request - The metadata request object.
Request parameters:
projectId - Required. The ID of the project against which to make the
request.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a ReserveIdsResponse.
Completes with a commons.ApiRequestError if the API endpoint returned an error.
If the used http.Client completes with an error when making a REST call,
this method will complete with the same error.
Implementation
async.Future<ReserveIdsResponse> reserveIds(
  ReserveIdsRequest request,
  core.String projectId, {
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  final url_ =
      'v1/projects/' + commons.escapeVariable('$projectId') + ':reserveIds';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return ReserveIdsResponse.fromJson(
      response_ as core.Map<core.String, core.dynamic>);
}