docs: public void addClasspath(Map<String, Object> conf, String classpath) {
      String cpKey = Config.TOPOLOGY_ADDITIONAL_CLASSPATH;
  
      if (conf.containsKey(cpKey)) {
        String newEntry = String.format("%s:%s", conf.get(cpKey), classpath);
        conf.put(cpKey, newEntry);
      } else {
        conf.put(cpKey, classpath);
      }
    }