code: @Override
      public long[] getChannelIDs() {
          long[] x = new long[this.cicMap.size()];
          Iterator<Long> it = this.cicMap.keySet().iterator();
          int index = 0;
          while (it.hasNext())
              x[index++] = it.next();
  
          return x;
      }
docs: /*
  (non-Javadoc)
  
  @see org.restcomm.protocols.ss7.isup.CircuitManager#getChannelIDs()