flatMap

external fun <R : JsAny?> flatMap(transform: (T) -> Promise<R>): Observable<R>(source)
external fun <R : JsAny?> flatMap(transform: (T) -> JsIterable<R>): Observable<R>(source)
external fun <R : JsAny?> flatMap(transform: (T) -> ReadonlyArray<R>): Observable<R>(source)
external fun <R : JsAny?> flatMap(transform: (T) -> AsyncIterable<R>): Observable<R>(source)
external fun <R : JsAny?> flatMap(transform: (T) -> Observable<R>): Observable<R>(source)