ReadonlycursorOptional ReadonlydefaultsOptional ReadonlyitemsWhere a page's entries are is said once, by the screen's page.at: a
A FeedConfig's items has no place here, neither spread in with the
config nor written — and a
feed screen has no item lists besides page.
ReadonlyrequestReadonlyresponseReadonlystart
Where a feed screen's pages come from — fields of the feed screen's own declaration, flat beside its
id,kindandinput: the feed's own declaration — itsrequest, itscursor(how an answer continues the cursor) and itsdefaults, asdefineFeedtakes them: each of the three moves in on its own, never a wholeFeedConfig(itsitemsis refused), the cursor of the first page from the screen's input (start), and the schema of one page's answer (response) — what a page shows, checked like any screen's data; it holds whatcursorreads.