@Override
        public NodeCandidate withExclusiveParent(boolean exclusiveParent) {
            return new ConcreteNodeCandidate(node, retiredNow, freeParentCapacity, parent, violatesSpares, exclusiveSwitch,
                                             exclusiveParent, isNew, isResizable);
        }
Called when the node described by this candidate must be created
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/provisioning/NodeCandidate.java