Method beginning

src/main/java/fieldnashorn/Nashorn.java:103–110

(boolean isEnding)

				return new Animatable.AnimationElement() {

					Animatable.AnimationElement[] targets = {fstart, fmiddle, fend};
					int index = 0;
					boolean finished = false;

					@Override
					public Object beginning(boolean isEnding) {
						targets[0] = interpretReturn(targets[0], targets[0].beginning(isEnding));
						targets[0] = interpretReturn(targets[0], targets[0].middle(isEnding));
						targets[0] = interpretReturn(targets[0], targets[0].end(isEnding));
						targets[1] = interpretReturn(targets[1], targets[1].beginning(isEnding));