docs: public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
          for (int i = 0; i < callbacks.length; i++) {
              WSPasswordCallback pc = (WSPasswordCallback)callbacks[i];
  
              String pass = passwords.get(pc.getIdentifier());
              if (pass != null) {
                  pc.setPassword(pass);
                  return;
              }
          }
      }