Method beginBox

src/main/java/fieldbox/boxes/TimeSlider.java:257–259

begins a box, given this slider. This is a lot like `_.begin()` except this slider is passed in as the reason that this box is running. In particular `_t()` works as expected and is tied to the position of this slider.

(Box b)

		}, () -> this.properties.get(Box.frame).y);
		init.asMap_set("slider", this);
		return Collections.singletonMap("_t", init);
	}

	/**
	 * begins a box, given this slider. This is a lot like `_.begin()` except this slider is passed in as the reason that this box is running. In particular `_t()` works as expected and is tied to the position of this slider.
	 */