list method
Lists Previews in a given project and location.
Request parameters:
parent - Required. The parent in whose context the Previews are listed.
The parent value is in the format:
'projects/{project_id}/locations/{location}'.
Value must have pattern ^projects/\[^/\]+/locations/\[^/\]+$.
filter - Optional. Lists the Deployments that match the filter
expression. A filter expression filters the resources listed in the
response. The expression must be of the form '{field} {operator} {value}'
where operators: '<', '>', '<=', '>=', '!=', '=', ':' are supported
(colon ':' represents a HAS operator which is roughly synonymous with
equality). {field} can refer to a proto or JSON field, or a synthetic
field. Field names can be camelCase or snake_case. Examples: - Filter by
name: name = "projects/foo/locations/us-central1/deployments/bar - Filter
by labels: - Resources that have a key called 'foo' labels.foo:* -
Resources that have a key called 'foo' whose value is 'bar' labels.foo =
bar - Filter by state: - Deployments in CREATING state. state=CREATING
orderBy - Optional. Field to use to sort the list.
pageSize - Optional. When requesting a page of resources, 'page_size'
specifies number of resources to return. If unspecified, at most 500 will
be returned. The maximum value is 1000.
pageToken - Optional. Token returned by previous call to
'ListDeployments' which specifies the position in the list from where to
continue listing the resources.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a ListPreviewsResponse.
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<ListPreviewsResponse> 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') + '/previews';
  final response_ = await _requester.request(
    url_,
    'GET',
    queryParams: queryParams_,
  );
  return ListPreviewsResponse.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}