code: @Deprecated
    public static String unquoteIdentifier(String string) {
      if (string != null && string.startsWith("`") && string.endsWith("`") && string.length() >= 2) {
        return string.substring(1, string.length() - 1).replace("``", "`");
      }
      return string;
    }
docs: UnQuote string.
  
  @param string value
  @return unquote string
  @deprecated since 1.3.0