code: public synchronized void
  addTrustedKey(DNSKEYRecord key) {
  	Name name = key.getName();
  	List list = (List) trustedKeys.get(name);
  	if (list == null)
  		trustedKeys.put(name, list = new LinkedList());
  	list.add(key);
  }
docs: Adds the specified key to the set of trusted keys