code: public void setComment(String newComment)
  	{
  		if (comment.length() > COMMENT_SIZE)
  		{
  			comment = newComment.substring(0, COMMENT_SIZE);
  		}
  		else
  		{
  			comment = newComment;
  		}
  	}
docs: Set the comment field of the tag.  The maximum size of the String is 30.
  If the size exceeds the maximum size, the String will be truncated.
  
  @param newComment the comment of the tag