public static VtmThemes getDefaultVariant() {
        final String vtmDefaultVariantName = Settings.getVtmDefaultVariantName();
        for (VtmThemes vtmTheme : VtmThemes.values()) {
            if (StringUtils.equals(vtmTheme.name(), vtmDefaultVariantName)) {
                return vtmTheme;
            }
        }
        return OSMARENDER; // for compatibility reasons return this instead of DEFAULT
    }
returns currently selected theme or default theme, if none configured
main/src/main/java/cgeo/geocaching/unifiedmap/mapsforgevtm/VtmThemes.java