create method
Creates a GTM Trigger.
request - The metadata request object.
Request parameters:
accountId - The GTM Account ID.
containerId - The GTM Container ID.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a Trigger.
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<Trigger> create(
  Trigger request,
  core.String accountId,
  core.String containerId, {
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  final url_ =
      'tagmanager/v1/accounts/' +
      commons.escapeVariable('$accountId') +
      '/containers/' +
      commons.escapeVariable('$containerId') +
      '/triggers';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return Trigger.fromJson(response_ as core.Map<core.String, core.dynamic>);
}