public int hashCode() {
        int hash = 17;
        hash = 37 * hash + name.hashCode();
        hash = 37 * hash + configId.hashCode();
        hash = 37 * hash + namespace.hashCode();
        return hash;
    }
Comparison sort order: namespace, name, configId.
config/src/main/java/com/yahoo/vespa/config/ConfigKey.java