Inheritance: Inline
 public LinkDefinition(Link link)
 {
     Link = link;
 }
 public virtual void Visit(Link inline)
 {
     WriteStartTag(inline, "a",
         new Attribute("href", inline.Destination.Inlines, true),
         new Attribute("title", inline.Title.Inlines)
     );
     Write(inline.Label.Inlines);
     WriteEndTag(inline, "a");
 }