Optional__Sequence of the last message shared with the parent path; null means none are shared.
OptionalKindHow the fork started; a row without it counts as 'Fork'.
OptionalNameFork this one started from; null means it started from Main.
OptionalSourceThe edited message (Edit) or the replaced answer (Regenerate); null otherwise.
OptionalUserThe name of that person (the view's virtual field).
OptionalUserThe person who started the fork.
One
MJ: Conversation Branchesrow (a fork), as the path helpers and the fork summaries need it.