public List<Node> patchNodes(Predicate<Node> filter, UnaryOperator<Node> patcher) {
        return patchNodes(nodeRepository.nodes().list().matching(filter).asList(), patcher);
    }
A test utility for provisioning tests.

@author bratseth
node-repository/src/test/java/com/yahoo/vespa/hosted/provision/provisioning/ProvisioningTester.java