code: private String kevsTpl(String kevs, String nodeName) {
          return kevs
                  .replaceAll("\\{\\{nodeName\\}\\}", nodeName)
                  .replaceAll("\\{\\{groupName\\}\\}", instance.getName());
      }
docs: Replaces {{groupName}} by the current group instance name and {{nodeName}} by the given nodeName in parameter
  @param kevs the KevScript to interpolate
  @param nodeName the value to replace {{nodeName}} with
  @return interpolated kevscript