public static function includeComponent($componentName, $componentTemplate, $arParams = array(), $parentComponent = null, $arFunctionParams = array())
 {
     $componentRelativePath = \CComponentEngine::MakeComponentPath($componentName);
     if (StrLen($componentRelativePath) <= 0) {
         return False;
     }
     if (is_object($parentComponent)) {
         if (!$parentComponent instanceof \cbitrixcomponent) {
             $parentComponent = null;
         }
     }
     $result = null;
     $bComponentEnabled = !isset($arFunctionParams["ACTIVE_COMPONENT"]) || $arFunctionParams["ACTIVE_COMPONENT"] != "N";
     $component = new \CBitrixComponent();
     if ($component->InitComponent($componentName)) {
         $obAjax = null;
         if ($bComponentEnabled) {
             $component->setSiteId(static::getInstance()->getSiteId());
             $component->setLanguageId(static::getInstance()->getLanguageId());
             $component->setSiteTemplateId(static::getInstance()->getSiteTemplateId());
             $result = $component->IncludeComponent($componentTemplate, $arParams, $parentComponent);
             $arThemeCss = array();
             // TODO: use styles array from $component
             foreach ($arThemeCss as $cssPath) {
                 static::getInstance()->setStyle($cssPath);
             }
         }
     }
     return $result;
 }