A valid async data service whose members INCLUDE everything the object schema
S describes: a partial (subset) schema. Every described member must exist on
the service with a compatible type, but the service MAY expose additional,
undescribed members.
S is sideloaded — supplied as a second type argument from typeof MyService.schema
(a ... as const satisfies Schema), never read off the service instance.
A valid async data service whose members INCLUDE everything the object schema
Sdescribes: a partial (subset) schema. Every described member must exist on the service with a compatible type, but the service MAY expose additional, undescribed members.Sis sideloaded — supplied as a second type argument fromtypeof MyService.schema(a... as const satisfies Schema), never read off the service instance.