public static MapSource getAnyMapSource() {
        return mapSources.isEmpty() ? null : mapSources.entrySet().iterator().next().getValue();
    }
Return a map source if there is at least one.

@return the first map source in the collection, or <tt>null</tt> if there are none registered
main/src/main/java/cgeo/geocaching/maps/MapProviderFactory.java