delete method
Deletes the specified document.
This method is a [long-running
operation](https://cloud.google.com/dialogflow/cx/docs/how/long-running-operation).
The returned Operation type has the following method-specific fields: -
metadata: KnowledgeOperationMetadata - response: An
Empty message
Request parameters:
name - Required. The name of the document to delete. Format:
projects//locations//knowledgeBases//documents/.
Value must have pattern
^projects/\[^/\]+/knowledgeBases/\[^/\]+/documents/\[^/\]+$.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a GoogleLongrunningOperation.
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<GoogleLongrunningOperation> delete(
  core.String name, {
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v2/' + core.Uri.encodeFull('$name');
  final response_ = await _requester.request(
    url_,
    'DELETE',
    queryParams: queryParams_,
  );
  return GoogleLongrunningOperation.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}