E. a non-abstract property in a category or struct where you use just get; that has a semicolon (typically combined with set;) to indicate the compiler should really deliver the body with the get accessor routinely. Fields have a "visibility" this decides what other lessons can see the field, so https://share.evernote.com/note/e46e55fb-47c2-8d63-a83d-87a3fdf7eb23