Attaches a client to a store: mounts its reducers and middleware, and
registers its private slot on the store's client registry.
Safe to call more than once for the same client — RTK deduplicates reducer
injection, and re-registering a slot simply overwrites it with equal values.
Client slices must each have a distinct reducer path when sharing a store.
Attaches a client to a store: mounts its reducers and middleware, and registers its private slot on the store's client registry.
Safe to call more than once for the same client — RTK deduplicates reducer injection, and re-registering a slot simply overwrites it with equal values. Client slices must each have a distinct reducer path when sharing a store.