Request: Single.using

To match Observable.using

public static <T, Resource> Single<T> using(
        Func0<Resource> resourceFactory,
        Func1<? super Resource, ? extends Single<? extends T>> singleFactory,
        Action1<? super Resource> disposeAction)

and

public static <T, Resource> Single<T> using(
        Func0<Resource> resourceFactory,
        Func1<? super Resource, ? extends Single<? extends T>> singleFactory,
        Action1<? super Resource> disposeAction, boolean disposeEagerly)

[akarnokd]

I'll do this.

[akarnokd]

See #3752

[artem-zinnatullin]

PR was merged and released as part of v1.1.2, this issue can be closed!

[akarnokd]

Closing via #3752.