mapSelf

fun <T : Any, R : Any> Flowable<T>.mapSelf(mapper: T.() -> R): @NonNull Flowable<R>

fun <T : Any, R : Any> Observable<T>.mapSelf(mapper: T.() -> R): @NonNull Observable<R>

fun <T, R : Any> Maybe<T>.mapSelf(mapper: T.() -> R): @NonNull Maybe<R>