public virtual ListTaskDefinitionFamiliesResponse ListTaskDefinitionFamilies(ListTaskDefinitionFamiliesRequest request){var options = new InvokeOptions();options.RequestMarshaller = ListTaskDefinitionFamiliesRequestMarshaller.Instance;options.ResponseUnmarshaller = ListTaskDefinitionFamiliesResponseUnmarshaller.Instance;return Invoke<ListTaskDefinitionFamiliesResponse>(request, options);}