Get the current value of this Rx at this very moment, without listening for updates
Get the current value of this Rx and listen for updates.
Kills this Rx; stop listening for updates, and release all references to other Rxs.
Force trigger/notifications of any downstream Rxs, without changing the current value
Force this Rx to recompute (whether or not any upstream Rxs changed) and propagate changes downstream.
Run the given function immediately, and again whenever this Rxs value changes.
Run the given function whenever this Rxs value changes, but not immediately.