1.x fromCallable() @experimental -> @beta

Author: artem-zinnatullin

src/main/java/rx/Observable.java

@@ -1464,7 +1464,7 @@ public static <T> Observable<T> from(T[] array) {
      * @see #defer(Func0)
      * @since (if this graduates from Experimental/Beta to supported, replace this parenthetical with the release number)
      */
-    @Experimental
+    @Beta
     public static <T> Observable<T> fromCallable(Callable<? extends T> func) {
         return create(new OnSubscribeFromCallable<T>(func));
     }

src/main/java/rx/Single.java

@@ -603,7 +603,7 @@ public static <T> Single<T> from(Future<? extends T> future, Scheduler scheduler
      *         the type of the item emitted by the {@link Single}.
      * @return a {@link Single} whose {@link Observer}s' subscriptions trigger an invocation of the given function.
      */
-    @Experimental
+    @Beta
     public static <T> Single<T> fromCallable(final Callable<? extends T> func) {
         return create(new OnSubscribe<T>() {
             @Override