docs: public void addAudioPayloadTypes(final List<PayloadType.Audio> pts) {
          synchronized (payloads) {
              Iterator<PayloadType.Audio> ptIter = pts.iterator();
              while (ptIter.hasNext()) {
                  PayloadType.Audio pt = ptIter.next();
                  addJinglePayloadType(new JinglePayloadType.Audio(pt));
              }
          }
      }