Function orEmpty

internal/httpapi/messages.go:709–714

orEmpty coalesces a nil slice of any element type to an empty slice so the JSON renders as [] rather than null (A-3). Pair with `nullable:"false"` on the field so the spec and the runtime agree.

(s []T)

// JSON renders as [] rather than null (A-3). Pair with `nullable:"false"` on
// the field so the spec and the runtime agree.
func orEmpty[T any](s []T) []T {
	if s == nil {
		return []T{}
	}
	return s
}