class ContainerAttribute {

  public void clearSet(T key) {
    Preconditions.checkNotNull(key);

    if (attributeMap.containsKey(key)) {
      attributeMap.get(key).clear();
    } else {
      if (LOG.isDebugEnabled()) {
        LOG.debug("key: {} does not exist in the attributeMap", key);
      }
    }
  }

  public  ContainerAttribute(Map<T, NavigableSet<ContainerID>> attributeMap);
  public  ContainerAttribute();

}