A Discussion has some header information and a collection of related notes.
addNote:
at:
Primitive. Assumes receiver is indexable. Answer the value of an indexable element in the receiver. Fail if the argument index is not an Integer or is out of bounds. Essential. See Object documentation whatIsAPrimitive.
at:addNote:
author
children
description
description:
notes
relatedURL
relatedURL:
status
timestamp
title
title:
url
fake the url as the title
