code: void idChanged(Date date, String id)
      {
          final String oldId = this.id;
  
          if (oldId != null && oldId.equals(id))
          {
              return;
          }
  
          this.id = id;
          firePropertyChange(PROPERTY_ID, oldId, id);
      }
docs: Changes the id of this channel.
  
  @param date date of the name change.
  @param id the new unique id of this channel.