code: public static String createUnquotedConstant(String str) {
          if (str == null || str.isEmpty()) {
              return str;
          }
          if (str.startsWith("\"")) {
              str = str.substring(1);
          }
          if (str.endsWith("\"")) {
              str = str.substring(0,
                                  str.length() - 1);
          }
          return str;
      }
docs: Removes double-quotes from around a string
  @param str
  @return