link method
Adds a Destination to this Container and removes it from the Container to which it is currently linked.
Request parameters:
parent - GTM parent Container's API relative path.
Value must have pattern ^accounts/\[^/\]+/containers/\[^/\]+$.
allowUserPermissionFeatureUpdate - Must be set to true to allow
features.user_permissions to change from false to true. If this operation
causes an update but this bit is false, the operation will fail.
destinationId - Destination ID to be linked to the current container.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a Destination.
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<Destination> link(
  core.String parent, {
  core.bool? allowUserPermissionFeatureUpdate,
  core.String? destinationId,
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if (allowUserPermissionFeatureUpdate != null)
      'allowUserPermissionFeatureUpdate': [
        '${allowUserPermissionFeatureUpdate}',
      ],
    if (destinationId != null) 'destinationId': [destinationId],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ =
      'tagmanager/v2/' +
      core.Uri.encodeFull('$parent') +
      '/destinations:link';
  final response_ = await _requester.request(
    url_,
    'POST',
    queryParams: queryParams_,
  );
  return Destination.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}