code: public List<Jid> getRoomsBlocked(DomainBareJid mucLightService)
              throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
          MUCLightBlockingIQ mucLightBlockingIQResult = getBlockingList(mucLightService);
  
          List<Jid> jids = new ArrayList<>();
          if (mucLightBlockingIQResult.getRooms() != null) {
              jids.addAll(mucLightBlockingIQResult.getRooms().keySet());
          }
  
          return jids;
      }
docs: Get rooms blocked.
  
  @param mucLightService
  @return the list of rooms blocked
  @throws NoResponseException
  @throws XMPPErrorException
  @throws NotConnectedException
  @throws InterruptedException