@Override public Call<List<String>> getRemoteServiceNames(String serviceName) {
        return Call.emptyList(); // incorrect for not yet ported 3rd party storage components.
      }
A component that provides storage interfaces used for spans and aggregations. Implementations are
free to provide other interfaces, but the ones declared here must be supported.

@see InMemoryStorage
zipkin/src/main/java/zipkin2/storage/StorageComponent.java