filter

fun <T> ObservableProperty<T>.filter(equalityPolicy: ObservableProperty.EqualityPolicy<T> = defaultEqualityPolicy(), predicate: (T) -> Boolean): DeferredObservableProperty<T>
fun <T> ObservableProperty<T>.filter(    initialValue: T,     equalityPolicy: ObservableProperty.EqualityPolicy<T> = defaultEqualityPolicy(),     predicate: (T) -> Boolean): ObservableProperty<T>

A filter function applied to each element collected from the ObservableProperty.