Prado\Web\UI\TTemplateControl::registerContentPlaceHolder PHP Method

    public function registerContentPlaceHolder($id, TContentPlaceHolder $object)
    {
        if (isset($this->_placeholders[$id])) {
            throw new TConfigurationException('templatecontrol_placeholderid_duplicated', $id);
        } else {
            $this->_placeholders[$id] = $object;
        }
    }