Function merge

merge<A extends readonly unknown[]>(
    ...sources: [...ObservableInputTuple<A>[]],
): Observable<A[number]>

merge<A extends readonly unknown[]>(
    ...sourcesAndConcurrency: [...ObservableInputTuple<A>[], number?],
): Observable<A[number]>

merge<A extends readonly unknown[]>(
    ...sourcesAndScheduler: [...ObservableInputTuple<A>[], SchedulerLike?],
): Observable<A[number]>

merge<A extends readonly unknown[]>(
    ...sourcesAndConcurrencyAndScheduler: [
        ...ObservableInputTuple<A>[],
        number?,
        SchedulerLike?,
    ],
): Observable<A[number]>