BetaBetaThe initial boolean value for this observable.
Optionaloptions: ObservableOptionsOptional configuration for the observable, such as whether the value can be written by the client.
BetaThe new boolean value to set.
BetaA function that receives the new boolean value each time the observable changes.
BetaThe callback handle previously returned by subscribe.
An observable that holds a boolean value. Listeners are notified whenever the value changes.