Prado\Web\UI\TPage::setHead PHP Метод

    public function setHead(THead $value)
    {
        if ($this->_head) {
            throw new TInvalidOperationException('page_head_duplicated');
        }
        $this->_head = $value;
        if ($this->_title !== null) {
            $this->_head->setTitle($this->_title);
            $this->_title = null;
        }
    }