insert method
      
Future<Notification> 
insert(
    
- Notification request,
- String bucket, {
- String? userProject,
- String? $fields,
Creates a notification subscription for a given bucket.
request - The metadata request object.
Request parameters:
bucket - The parent bucket of the notification.
userProject - The project to be billed for this request. Required for
Requester Pays buckets.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a Notification.
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<Notification> insert(
  Notification request,
  core.String bucket, {
  core.String? userProject,
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if (userProject != null) 'userProject': [userProject],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ =
      'b/' + commons.escapeVariable('$bucket') + '/notificationConfigs';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return Notification.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}