entities method
List all entities in a GTM Folder.
Request parameters:
path - GTM Folder's API relative path. Example:
accounts/{account_id}/containers/{container_id}/workspaces/{workspace_id}/folders/{folder_id}
Value must have pattern
^accounts/\[^/\]+/containers/\[^/\]+/workspaces/\[^/\]+/folders/\[^/\]+$.
pageToken - Continuation token for fetching the next page of results.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a FolderEntities.
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<FolderEntities> entities(
  core.String path, {
  core.String? pageToken,
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if (pageToken != null) 'pageToken': [pageToken],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'tagmanager/v2/' + core.Uri.encodeFull('$path') + ':entities';
  final response_ = await _requester.request(
    url_,
    'POST',
    queryParams: queryParams_,
  );
  return FolderEntities.fromJson(
      response_ as core.Map<core.String, core.dynamic>);
}