protected function _getFallbackMethod(
        $varname, array $arguments = array(), $throw_errors = false, $fallback = null
    ) {
        $var = $this->_getFallbackVarname($varname);

        $template_val = $this->_runFallbackMethod($this->template, $var, $arguments, $throw_errors, $fallback);
        if (!empty($template_val)) {
            return $template_val;
        }

        $view_val = $this->_runFallbackMethod($this->view, $var, $arguments, $throw_errors, $fallback);
        if (!empty($view_val)) {
            return $view_val;
        }

        return null;
    }