Function isA

isA<K extends keyof BrandType>(x: unknown, key: K): x is BrandType[K]
Narrowing type guard: is x of the type keyed by key? Pass a BrandType key — a base-type name ("SohlLogic") or a kind value (ITEM_KIND.SKILL / ACTOR_KIND.BEING, which narrow because defineType preserves literals). Base types are matched by their BRAND Symbol; item/actor kinds by the logic's .kind discriminant.
Type Parameters
- K extends keyof BrandType
Parameters
- x: unknown
  The value to test.
- key: K
  The brand/kind key (a BrandType key).
Returns x is BrandType[K]
Whether x matches key, narrowing x to BrandType[key].
- Defined in src/utils/constants.ts:87