@NonNull
    public static SearchResult searchByViewport(@NonNull final Viewport viewport, @Nullable final GeocacheFilter filter) {
        final SearchResult result = SearchResult.parallelCombineActive(searchByViewPortConns, connector -> connector.searchByViewport(viewport, filter));
        AmendmentUtils.amendCachesForViewport(result, viewport, filter);
        return result;
    }
Obtain the connector by it's name.
If connector is not found, return UNKNOWN_CONNECTOR.

@param connectorName connector name String
@return The connector matching name
main/src/main/java/cgeo/geocaching/connector/ConnectorFactory.java