This trait supports an endpoint identification state (such as a flashing light) that indicates
to an observer (such as an installer) which of several nodes or endpoints it is.
This trait provides a standardized way for a node to expose information about logical grouping
of endpoints on the node, expose information about named actions that can be performed on a
group of endpoints, expose commands to trigger such actions, and expose events to receive
feedback on the state of such actions.
