public class EmitterCollapseExtensionsKt
static <T> Emitter<T>
useWhen(Emitter<? extends T> $receiver, Emitter<java.lang.Boolean> isNeedUse, Emitter<? extends T> placeholder)
@NotNull public static <T> Emitter<T> useWhen(@NotNull Emitter<? extends T> $receiver, @NotNull Emitter<java.lang.Boolean> isNeedUse, @NotNull Emitter<? extends T> placeholder)