public static String[][] unboxStringArrays(Collection<String[]> coll) {
    return coll.toArray(new String[coll.size()][]);
  }
public static String [ ] [ ] unboxStringArrays ( Collection < String [ ] > coll ) { return coll . toArray ( new String [ coll . size ( ) ] [ ] ) ; }
Convert a Collection of Strings[] to a plain array String[][].