@WorkerThread
    default void amendCachesForViewport(@NonNull SearchResult searchResult, @NonNull Viewport viewport) {
        amendCaches(searchResult);
    }
amends the given caches with additional data specific to the implementing connector.
The data was retrieved for the given viewport, this info should be used by the amender to
optimize amendment
main/src/main/java/cgeo/geocaching/connector/capability/ICacheAmendment.java