delete method
Immediately and permanently deletes the specified draft.
Does not simply trash it.
Request parameters:
userId - The user's email address. The special value me can be used to
indicate the authenticated user.
id - The ID of the draft to delete.
$fields - Selector specifying which fields to include in a partial
response.
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<void> delete(
  core.String userId,
  core.String id, {
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  final url_ =
      'gmail/v1/users/' +
      commons.escapeVariable('$userId') +
      '/drafts/' +
      commons.escapeVariable('$id');
  await _requester.request(
    url_,
    'DELETE',
    queryParams: queryParams_,
    downloadOptions: null,
  );
}