code: public String getActiveListName() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
          if (cachedActiveListName != null) {
              return cachedActiveListName;
          }
          return getPrivacyWithListNames().getActiveName();
      }
docs: Get the name of the active list.
  
  @return the name of the active list or null if there is none set.
  @throws NoResponseException
  @throws XMPPErrorException
  @throws NotConnectedException
  @throws InterruptedException
  @since 4.1