code: public static Collection<String> getTagNames(Channel channel) {
  		Collection<String> tagNames = new HashSet<String>();
  		for (Tag tag : channel.getTags()) {
  			tagNames.add(tag.getName());
  		}
  		return tagNames;
  	}
docs: Return a list of tag names associated with this channel
  
  @param channel - channel to be processed
  @return Collection of names of tags