Method save

src/main/java/field/graphics/StateTracker.java:69–106

()

	}

	public Util.ExceptionlessAutoClosable save() {

		try {
			if (GraphicsContext.currentGraphicsContext == null) throw new IllegalStateException(" save() only valid inside draw method ");
			for (Field f : this.getClass()
					   .getDeclaredFields()) {
				if (f.getType()
				     .isAssignableFrom(State.class)) {
					try {
						State s = (State) f.get(this);
						allStates.put(f.getName(), s);
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
			}

			List<AutoCloseable> r = new ArrayList<>();
			for (State s : allStates.values()) {

				r.add(s.save());
				GraphicsContext.checkError(() -> "" + s);
			}

			return () -> {

				r.forEach(x -> {
					try {
						x.close();
					} catch (Exception e) {
						e.printStackTrace();
					}
				});
			};
		} finally {
//				GraphicsContext.checkError();
		}
	}

	/**
	 * dumps the current state to a string