POST /cart/:cartId/sets: a set from a collection page, added in one request, everything or
nothing. items are plain lines; configured option groups in the shape of configured-items.
A configured entry without (some of) its selections inherits them from the set's first group of
the same profile, and parts of one product in the same choices become one group.
POST /cart/:cartId/sets: a set from a collection page, added in one request, everything or nothing.itemsare plain lines;configuredoption groups in the shape ofconfigured-items. A configured entry without (some of) its selections inherits them from the set's first group of the same profile, and parts of one product in the same choices become one group.