public function getList($inputControlId)
    {
        if (array_key_exists($inputControlId, $this->functionMap)) {
            return call_user_func(array($this, $this->functionMap[$inputControlId]));
        } elseif (array_key_exists($inputControlId, $this->ajaxFunctionMap)) {
            return array();
        } else {
            return null;
        }
    }