private function _startThemeManager()
{
$themeManager = new TThemeManager();
$themeManager->BasePath = "System.Wsat.themes";
$url = Prado::getApplication()->getAssetManager()->publishFilePath(Prado::getPathOfNamespace('System.Wsat'));
$themeManager->BaseUrl = "{$url}/themes";
$themeManager->init(null);
$this->setThemeManager($themeManager);
}