Does the Angular resource API support adding an initial value for the resource?

Suppose we first check whether a resource is not loading like this:

    @if (!countriesResource.isLoading()) {
      <ul>
        @for (
          country of countriesResource.value(); 
          track country.name.official
        ) {
          <li>{{ country.name.official }}</li>
        }
      </ul>

If the resource is not loading, however has not initiated a request yet, is there a way to provide an initial value so that countriesResource.value() resolves to an initial value?