public String toString() {
		StringBuilder result = new StringBuilder("{");
		for (Map.Entry<Class<?>, Integer> pair : entrySet()) {
			result.append(pair.getKey().getSimpleName());
			result.append("=");
			result.append(pair.getValue());
			result.append(", ");
		}
		result.delete(result.length() - 2, result.length());
		result.append("}");
		return result.toString();
	}