Random provider provider :D

    public ValueProvider getRandomProvider(Class cls) {
        List<ValueProvider> list = providers.get(cls);

        if (list == null || list.isEmpty())
            return null;

        float sum = 0;
        for (ValueProvider provider : list)
            sum += provider.getProbability();

        float random = (float) (Math.random() * sum);

        for (ValueProvider provider : list) {
            random -= provider.getProbability();
            if (random <= 0)
                return provider;
        }

        throw new RuntimeException("WAT?");
    }