create method
Create a new watch.
If a watch ID is provided, it must be unused. For each invoking project, the per form limit is one watch per Watch.EventType. A watch expires seven days after it is created (see Watch.expire_time).
request - The metadata request object.
Request parameters:
formId - Required. ID of the Form to watch.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a Watch.
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<Watch> create(
  CreateWatchRequest request,
  core.String formId, {
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v1/forms/' + commons.escapeVariable('$formId') + '/watches';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return Watch.fromJson(response_ as core.Map<core.String, core.dynamic>);
}