private static void applyWantedStateToBaselineState(final NodeState baseline, final NodeState wanted) {
        // Only copy state and description from Wanted state; this preserves auxiliary
        // information such as disk states and startup timestamp.
        baseline.setState(wanted.getState());
        baseline.setDescription(wanted.getDescription());
    }
Infer parameters from controller options. Important: does _not_ set cluster;
it must be explicitly set afterwards on the returned parameter object before
being used to compute states.
clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/ClusterStateGenerator.java