protected List<DummyVdsNode> setUpVdsNodes(Timer timer, boolean startDisconnected, List<ConfiguredNode> configuredNodes) throws Exception {
        nodes = new ArrayList<>();
        for (ConfiguredNode configuredNode : configuredNodes) {
            nodes.add(createNode(timer, startDisconnected, DISTRIBUTOR, configuredNode.index()));
            nodes.add(createNode(timer, startDisconnected, STORAGE, configuredNode.index()));
        }
        return nodes;
    }
Creates dummy vds nodes for the list of configured nodes and returns them.
As two dummy nodes are created for each configured node - one distributor and one storage node -
the returned list is twice as large as configuredNodes.
clustercontroller-core/src/test/java/com/yahoo/vespa/clustercontroller/core/FleetControllerTest.java