public static Dimension fromWire(String wireName) {
        Dimension dimension = dimensionsByWireName.get(wireName);
        if (dimension == null) {
            throw new IllegalArgumentException("Unknown serialized dimension: '" + wireName + "'");
        }

        return dimension;
    }
Virtual zone ID from com.yahoo.config.provision.zone.ZoneId::value of the form environment.region,
see com.yahoo.config.provision.zone.ZoneApi::getVirtualId.  <em>Eager resolution</em>, see {@link #CLOUD}.
flags/src/main/java/com/yahoo/vespa/flags/Dimension.java