An entry of a kind the library does not model, as the page lists it: the
entry's item carries the kind's key and the raw entry, so a caller can see
it, and nothing is sent. The server's list is an open union ("Screens are the
product surface"), so an unmodelled kind is this item and never a failed feed.
An entry of a kind the library does not model, as the page lists it: the entry's
itemcarries the kind's key and the raw entry, so a caller can see it, and nothing is sent. The server's list is an open union ("Screens are the product surface"), so an unmodelled kind is this item and never a failed feed.