public function setTypesGroup($types, $attr = null)
    {
        if (! is_array($types))
            $types = [$types => $attr];

        foreach ($types as $type => $attrList) {
            if (! is_array($attrList))
                $attrList = [$attrList];

            foreach ($attrList as $attr)
                $this->inputType[$attr] = $type;
        }

        return $this;
    }