public function string_deprecated($identifier, $component) {
        $deprecated = $this->load_deprecated_strings();
        list($plugintype, $pluginname) = core_component::normalize_component($component);
        $normcomponent = $pluginname ? ($plugintype . '_' . $pluginname) : $plugintype;
        return isset($deprecated[$identifier . ',' . $normcomponent]);
    }