Observes the membership status of a specific item in the set. The returned observable will emit true if the item is a member of the set, and false otherwise. Emits updates whenever the membership status changes.

dispose

abstract override fun dispose()

Unregisters every callback registered with this observable.

map

abstract fun <S> map(transform: (Set<T>) -> S): Observable<S>

Transforms the current observable into a new observable by applying the specified transformation function to its emitted values.

mergeWith

abstract fun <O, R> mergeWith(other: Observable<O>, merge: (Set<T>, O) -> R): Observable<R>

Combines the current observable with another observable, producing a new observable that emits values derived by applying the provided merge function to the current values of both observables.

onChange

abstract fun onChange(notifyOnRegistration: Boolean = true, callback: (Set<T>) -> Unit): Disposable

Registers callback to be invoked with every new value of this observable, and right away with the current one if notifyOnRegistration.