TreeSelector - A tree selector can be used to select
certificates or keys.
UnlockOptionsWidget - This widget displays a
set of unlock options for the user to select.
ViewerWidget - A viewer widget which can display
certificates and keys that are located in files.
Enums:
CollectionModelMode - If a [
class@CollectionModel] is created with a mode of gcr_collection_model_tree, then any included objects
that are themselves a [iface@Gcr.