access 'previous' state of search params?

  function withPreviousSearch(fn: (prev: <existing params for the route>) => <search key i'm updating>) {
    void navigate({
      search: (prev) => ({
        ...prev,
        filters: { ...prev.filters, ...search },
      }),
    });
  }

  function withPreviousSearch(fn: (prev: <existing params for the route>) => <search key i'm updating>) {
    void navigate({
      search: (prev) => ({
        ...prev,
        filters: { ...prev.filters, ...search },
      }),
    });
  }