@Override
    @NonNull
    public String toString() {
        if (name != null) {
            return TextUtils.stripHtml(name);
        }

        if (guid != null) {
            return guid;
        }

        return "???";
    }
Set the trackable missing status

@param missing the new missing status
main/src/main/java/cgeo/geocaching/models/Trackable.java