Class

packages/solid-query/src/__tests__/useIsMutating.test.tsx:248–248

    // We have to mock the MutationCache to not unsubscribe
    // the listener when the component is unmounted
    class MutationCacheMock extends QueryCore.MutationCache {
      subscribe(listener: any) {
        super.subscribe(listener)
        return () => void 0