Connects the given selector to this event.
Disconnects the given selector from this event.
Involves this event in the pull-phase of event delivery.
Involves this event in the pull-phase of event delivery. The event should check
the source of the originally fired event, and if it identifies itself with that
source, cast the update
to the appropriate type A
and wrap it in an instance
of Some
. If this event is not the source, it should invoke pull
on any
appropriate event source feeding this event.
the update
as seen through this event, or None
if the event did not
originate from this part of the dependency graph or was absorbed by
a filtering function
Registers a live observer with this event.
Registers a live observer with this event. The method is called with the
observing function which receives the event's update messages, and the
method generates an opaque Disposable
instance, which may be used to
remove the observer eventually (through the dispose
method).