Caffeinated\Menus\Item::attribute PHP Метод

    public function attribute($attribute, $value = null)
    {
        if (isset($attribute) and is_array($attribute)) {
            if (array_key_exists('class', $attribute)) {
                $this->attributes['class'] = $this->builder->formatGroupClass(['class' => $attribute['class']], $this->attributes);
                unset($attribute['class']);
            }
            $this->attributes = array_merge($this->attributes, $attribute);
            return $this;
        } elseif (isset($attribute) and isset($value)) {
            if ($attribute == 'class') {
                $this->attributes['class'] = $this->builder->formatGroupClass(['class' => $value], $this->attributes);
            } else {
                $this->attributes[$attribute] = $value;
            }
            return $this;
        }
        return isset($this->attributes[$attribute]) ? $this->attributes[$attribute] : null;
    }