code: public void set(Tag.Builder tag, Collection<String> channelNames) throws ChannelFinderException {
  		wrappedSubmit(new SetTag(tag.toXml(), channelNames));
  	}
docs: Set tag <tt>tag</tt> on the set of channels {channels} and remove it from
  all others.
  
  @param tag
  - the tag to be set.
  @param channelNames
  - the list of channels to which this tag will be added and
  removed from all others.
  @throws ChannelFinderException - channelfinder exception