@Override
        public int compareTo(NodeCandidate other) {
            int comparison = super.compareTo(other);
            if (comparison != 0) return comparison;

            // Unimportant tie-breaking:
            if ( ! (other instanceof ConcreteNodeCandidate)) return -1;
            return this.node.hostname().compareTo(((ConcreteNodeCandidate)other).node.hostname());
        }
Called when the node described by this candidate must be created
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/provisioning/NodeCandidate.java