True when T is a flat struct whose every field is an isElicitScalar,
i.e. a valid type to derive an elicitation form requestedSchema from (via
jsonSchemaOf!T). Used by RequestContext.elicit!T and
InputRequest.elicitation!T to reject nested/array structs at compile time.
True when T is a flat struct whose every field is an isElicitScalar, i.e. a valid type to derive an elicitation form requestedSchema from (via jsonSchemaOf!T). Used by RequestContext.elicit!T and InputRequest.elicitation!T to reject nested/array structs at compile time.