list method
Lists Instances in a given project and location.
Request parameters:
parent - Required. The name of the parent resource. For the required
format, see the comment on the Instance.name field. Additionally, you can
perform an aggregated list operation by specifying a value with one of the
following formats: * projects/{project}/locations/-/clusters/- *
projects/{project}/locations/{region}/clusters/-
Value must have pattern
^projects/\[^/\]+/locations/\[^/\]+/clusters/\[^/\]+$.
filter - Optional. Filtering results
orderBy - Optional. Hint for how to order the results
pageSize - Optional. Requested page size. Server may return fewer items
than requested. If unspecified, server will pick an appropriate default.
pageToken - A token identifying a page of results the server should
return.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a ListInstancesResponse.
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<ListInstancesResponse> list(
  core.String parent, {
  core.String? filter,
  core.String? orderBy,
  core.int? pageSize,
  core.String? pageToken,
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if (filter != null) 'filter': [filter],
    if (orderBy != null) 'orderBy': [orderBy],
    if (pageSize != null) 'pageSize': ['${pageSize}'],
    if (pageToken != null) 'pageToken': [pageToken],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v1/' + core.Uri.encodeFull('$parent') + '/instances';
  final response_ = await _requester.request(
    url_,
    'GET',
    queryParams: queryParams_,
  );
  return ListInstancesResponse.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}