CancelContext - optionally provide a context that, when canceled will preclude the event from running.

ExtendContext - optionally provides a context which extends factory's context with its values.

FromContext - returns EventFactory from context.

NewNetworkServiceEndpointRegistryClient - returns a new null client that does nothing but call next.NetworkServiceEndpointRegistryClient(ctx).

NewNetworkServiceEndpointRegistryServer - returns a new null server that does nothing but call next.NetworkServiceEndpointRegistryServer(ctx).

NewNetworkServiceRegistryClient - returns a new null client that does nothing but call next.NetworkServiceRegistryClient(ctx).

NewNetworkServiceRegistryServer - returns a new null server that does nothing but call next.NetworkServiceRegistryServer(ctx).

EventFactory - allows firing off a Request or Close event from midchain.

Option - event option.