code: private String convertTimestamp() {
      //some locales (for example, French) generate timestamp text with characters not included in \w -
      // now using \S (all non-whitespace characters) instead of /w 
      String result = timestampFormat.replaceAll(VALID_DATEFORMAT_CHAR_PATTERN + "+", "\\\\S+");
      //make sure dots in timestamp are escaped
      result = result.replaceAll(Pattern.quote("."), "\\\\.");
      return result;
    }
docs: Helper method that will convert timestamp format to a pattern
  
  
  @return string