Method wrap

src/main/java/io/reactivex/rxjava3/core/Completable.java:1290–1299

Wraps the given CompletableSource into a Completable if not already Completable. Scheduler: wrap does not o

(@NonNull CompletableSource source)

     * @throws NullPointerException if {@code source} is {@code null}
     */
    @CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public static Completable wrap(@NonNull CompletableSource source) {
        Objects.requireNonNull(source, "source is null");
        if (source instanceof Completable) {
            return RxJavaPlugins.onAssembly((Completable)source);
        }
        return RxJavaPlugins.onAssembly(new CompletableFromUnsafeSource(source));
    }

    /**
     * Returns a {@code Completable} that emits the a terminated event of either this {@code Completable}