Method concat

src/main/java/io/reactivex/rxjava3/core/Single.java:192–198

Concatenate the single values, in a non-overlapping fashion, of the SingleSources provided by an Iterable sequence. Backpressure: </

(@NonNull Iterable<@NonNull ? extends SingleSource<? extends T>> sources)

     * @since 2.0
     */
    @CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    @BackpressureSupport(BackpressureKind.FULL)
    public static <@NonNull T> Flowable<T> concat(@NonNull Iterable<@NonNull ? extends SingleSource<? extends T>> sources) {
        return Flowable.fromIterable(sources).concatMapSingleDelayError(Functions.identity(), false);
    }

    /**
     * Concatenate the single values, in a non-overlapping fashion, of the {@link SingleSource}s provided by