Class First

src/main/java/fieldbox/boxes/plugins/Pseudo.java:576–655

	}

	static public class First implements AsMap {

		protected final Box on;

		public First(Box on) {
			this.on = on;
		}

		@Override
		public boolean asMap_isProperty(String s) {
			return true;
		}

		@Override
		public Object asMap_call(Object o, Object o1) {
			return null;
		}

		@Override
		public boolean asMap_delete(Object o) {
			Box q = (Box) asMap_get("" + o);
			if (q != null) {
				return q.properties.asMap_delete(o);
			}
			return false;
		}

		@Override
		public Object asMap_get(String s) {
			Dict.Prop p = new Dict.Prop(s);
			return on.breadthFirst(on.upwards())
				.filter(x -> x.properties.has(p))
				.findFirst()
				.orElseGet(() -> null);
		}

		@Override
		public Object asMap_set(String s, Object o) {

			if (o instanceof Box) {
				Dict.Prop p = new Dict.Prop(s);
				return on.breadthFirst(on.upwards())
					.filter(x -> x.properties.has(p))
					.findFirst()
					.map(x -> {
						Object v = x.properties.remove(p);
						((Box) o).properties.put(p, v);
						return v;
					});
			} else {
				throw new IllegalArgumentException(" can't move property to something that isn't a box");
			}
		}


		@Override
		public Object asMap_new(Object o) {
			return null;