Mono<ImmutableMap<String, String>> resolve(List<SchemaReference> refs) {
    return resolveReferences(refs, new Resolving(ImmutableMap.of(), ImmutableSet.of()))
        .map(Resolving::resolved);
  }
@Test
  void returnsEmptyMapOnEmptyInputs() {
    StepVerifier.create(schemaReferencesResolver.resolve(null))
        .assertNext(map -> Assertions.assertThat(map).isEmpty())
        .verifyComplete();

    StepVerifier.create(schemaReferencesResolver.resolve(List.of()))
        .assertNext(map -> Assertions.assertThat(map).isEmpty())
        .verifyComplete();
  }