list method
List TraceScopes of a project in a particular location.
Request parameters:
parent - Required. The full resource name of the location to look for
trace scopes: projects/[PROJECT_ID]/locations/[LOCATION_ID] For
example: projects/my-project/locations/global
Value must have pattern ^projects/\[^/\]+/locations/\[^/\]+$.
pageSize - Optional. The maximum number of results to return from this
request. Non-positive values are ignored. The presence of
next_page_token in the response indicates that more results might be
available.
pageToken - Optional. If present, then retrieve the next batch of
results from the preceding call to this method. page_token must be the
value of next_page_token from the previous response. The values of other
method parameters should be identical to those in the previous call.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a ListTraceScopesResponse.
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<ListTraceScopesResponse> list(
  core.String parent, {
  core.int? pageSize,
  core.String? pageToken,
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if (pageSize != null) 'pageSize': ['${pageSize}'],
    if (pageToken != null) 'pageToken': [pageToken],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v1/' + core.Uri.encodeFull('$parent') + '/traceScopes';
  final response_ = await _requester.request(
    url_,
    'GET',
    queryParams: queryParams_,
  );
  return ListTraceScopesResponse.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}