Notice - Notice contains
information on a notification element.
NoticesMonitor -
NoticesMonitor allows to receive in real time events from snapd, like status changes in an ongoing refresh, inhibited
refreshes due to the snap being active, or inhibited launches due to an ongoing refresh.
Plug - Plug contains
information about a Snap plug.
PlugRef - PlugRef contains
the state of Snap a interface plug_ref.