code: public static Range rangeOf(final String beginToken, final String endToken,
              final String string)
     {
        return rangeOf(beginToken, endToken, string, 0);
     }
docs: Return the range from a begining token to an ending token.
  
  @param beginToken String to indicate begining of range.
  @param endToken String to indicate ending of range.
  @param string String to look for range in.
  @return (begin index, end index) or <i>null</i>.