list method
Lists ad groups.
Request parameters:
advertiserId - Required. The ID of the advertiser the ad groups belongs
to.
Value must have pattern ^\[^/\]+$.
filter - Optional. Allows filtering by custom ad group fields. Supported
syntax: * Filter expressions are made up of one or more restrictions. *
Restrictions can be combined by AND and OR. A sequence of restrictions
implicitly uses AND. * A restriction has the form of {field} {operator} {value}. * All fields must use the EQUALS (=) operator. Supported
properties: * adGroupId * displayName * entityStatus * lineItemId
- adGroupFormatExamples: * All ad groups under an line item:- lineItemId="1234"* All- ENTITY_STATUS_ACTIVEor- ENTITY_STATUS_PAUSED- AD_GROUP_FORMAT_IN_STREAMad groups under an advertiser:- (entityStatus="ENTITY_STATUS_ACTIVE" OR entityStatus="ENTITY_STATUS_PAUSED") AND adGroupFormat="AD_GROUP_FORMAT_IN_STREAM"The length of this field should be no more than 500 characters. Reference our [filter- LISTrequests](/display-video/api/guides/how-tos/filters) guide for more information.
orderBy - Optional. Field by which to sort the list. Acceptable values
are: * displayName (default) * entityStatus The default sorting order
is ascending. To specify descending order for a field, a suffix "desc"
should be added to the field name. Example: displayName desc.
pageSize - Optional. Requested page size. Must be between 1 and 200.
If unspecified will default to 100. Returns error code
INVALID_ARGUMENT if an invalid value is specified.
pageToken - Optional. A token identifying a page of results the server
should return. Typically, this is the value of next_page_token returned
from the previous call to ListAdGroups method. If not specified, the
first page of results will be returned.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a ListAdGroupsResponse.
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<ListAdGroupsResponse> list(
  core.String advertiserId, {
  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_ =
      'v3/advertisers/' + core.Uri.encodeFull('$advertiserId') + '/adGroups';
  final response_ = await _requester.request(
    url_,
    'GET',
    queryParams: queryParams_,
  );
  return ListAdGroupsResponse.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}