public static boolean isAssignableFrom(Class<?> rawType1, Type[] actualTypeArguments1, Type type2) {
        ...
        } else if (type2 instanceof TypeVariable<?>) {
            TypeVariable<?> typeVariable = (TypeVariable<?>) type2;
            if (isTypeBounded(rawType1, actualTypeArguments1, typeVariable.getBounds())) {  <--- suspicious!
                return true;
            }
        }
        ...
    }

    public static boolean isTypeBounded(Type type, Type[] lowerBounds, Type[] upperBounds) {
        if (lowerBounds.length > 0) {
            if (!isAssignableFrom(type, lowerBounds)) {
                return false;
            }
        }
        if (upperBounds.length > 0) {
            if (!isAssignableFrom(upperBounds, type)) {
                return false;
            }
        }
        return true;
    }