delete method
Deletes an existing BackupPlan.
Request parameters:
name - Required. Fully qualified BackupPlan name. Format: projects / * /locations / * /backupPlans / * 
Value must have pattern
^projects/\[^/\]+/locations/\[^/\]+/backupPlans/\[^/\]+$.
etag - Optional. If provided, this value must match the current value of
the target BackupPlan's etag field or the request is rejected.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a GoogleLongrunningOperation.
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<GoogleLongrunningOperation> delete(
  core.String name, {
  core.String? etag,
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if (etag != null) 'etag': [etag],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v1/' + core.Uri.encodeFull('$name');
  final response_ = await _requester.request(
    url_,
    'DELETE',
    queryParams: queryParams_,
  );
  return GoogleLongrunningOperation.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}