Method asMap_get

src/main/java/fieldbox/boxes/Box.java:960–981

(String p)

			if (calling == null) throw new Error();
			return calling.apply(this, a);
		}

		@Override
		public Object asMap_get(String p) {

			Optional<Box> q = startFrom.breadthFirst(startFrom.upwards())
				.flatMap(x -> x.children()
					.stream()
					.filter(bx -> clazz.isInstance(bx) && bx.properties.getOr(Box.name, () -> "")
						.equals(namePrefix + ":" + p)))
				.findFirst();


			if (q.isPresent()) return q.get();

			Box b = autoconstructor.apply(startFrom);
			b.properties.put(Box.name, namePrefix + ":" + p);
			if (!clazz.isInstance(b))
				throw new IllegalArgumentException(" autoconstructor didn't return an object of the correct class <" + b.getClass() + "> <" + clazz + ">");

			startFrom.connect(b);

			return b;
		}