get(target, key) {
		if (target.exclude.includes(key)) return;
		get(target.version);
		return key in target.special ? target.special[key]() : target.props[key];
	}
The proxy handler for legacy $$restProps and $$props
@type {ProxyHandler<{ props: Record<string | symbol, unknown>, exclude: Array<string | symbol>, special: Record<string | symbol, (v?: unknown) => unknown>, version: Source<number> }>}}