public static RubyRange<String> range(String start, String end) {
    return new RubyRange<>(StringSuccessor.getInstance(), start, end,
        Interval.CLOSED);
  }
public static RubyRange < String > range ( String start , String end ) { return new RubyRange < > ( StringSuccessor . getInstance ( ) , start , end , Interval . CLOSED ) ; }
Creates a {@link RubyRange} by given strings.

@param start
of the range
@param end
of the range
@return {@link RubyRange}