TEXT_LINK_UNDERLINE: {
    readonly hover_on: "\u30DB\u30D0\u30FC\u3067\u8868\u793A";
    readonly hover_off: "\u30DB\u30D0\u30FC\u3067\u975E\u8868\u793A";
    readonly on: "\u5E38\u306B\u8868\u793A";
    readonly off: "\u5E38\u306B\u975E\u8868\u793A";
}