Any when a valid state is received.

Deleted when it's not there anymore.

Error when host is in error state.

Failed when installing something on a Started host was not a success.

Started when host is started.

Starting when host is starting.

Stopped when host is stopped.

Stopping when host is stopping.

Terminated when a host can be enumerated, but it's already deleted.

Unknown when the state is undetermined.

Enum represents the state of a host.