final public function setSubForms($subForms)
    {
        // sub controls string with format: ctrl1;ctrl2...
        if (!$subForms || strlen($subForms) < 1) {
            $this->subForms = null;
            return;
        }
        $subFormArr = explode(";", $subForms);
        unset($this->subForms);
        foreach ($subFormArr as $subForm) {
            $this->subForms[] = $this->prefixPackage($subForm);
        }
    }