QControlBase::RenderChildren PHP Method

    protected function RenderChildren($blnDisplayOutput = true)
    {
        $strToReturn = "";
        foreach ($this->GetChildControls() as $objControl) {
            if (!$objControl->Rendered) {
                $strRenderMethod = 'Render';
                if ($objControl->RenderMethod) {
                    $strRenderMethod = $objControl->RenderMethod;
                }
                $strToReturn .= $objControl->{$strRenderMethod}($blnDisplayOutput);
            }
        }
        if ($blnDisplayOutput) {
            print $strToReturn;
            return null;
        } else {
            return $strToReturn;
        }
    }