Event of a network interface, given the type (added, removed) and the interface name.

Poller periodically looks for the network interfaces in the system and forwards Event notifications when interfaces are added or deleted.

Registerer is an informer that wraps another informer implementation, and keeps track of the currently existing interfaces in the system, accessible through the IfaceNameForIndex method.

Watcher uses system's netlink to get real-time information events about network interfaces' addition or removal.

Informer provides notifications about each network interface that is added or removed from the host.

EventType for an interface: added, deleted.