docs: public static Tuple<String, String> split(String strColumn, String pattern, int index, String valueName) {
          String name = "split_" + random();
          String script = "";
          if (valueName == null) {
              script = "def " + name + " = doc['" + strColumn + "'].value.split('" + pattern + "')[" + index + "]";
  
          } else {
              script = "; def " + name + " = " + valueName + ".split('" + pattern + "')[" + index + "]";
          }
          return new Tuple<>(name, script);
      }