public ClusterSpec decideExclusivity(Capacity capacity, ClusterSpec requestedCluster) {
        if (capacity.cloudAccount().isPresent()) return requestedCluster.withExclusivity(true); // Implicit exclusive
        boolean exclusive = requestedCluster.isExclusive() && (capacity.isRequired() || zone.environment() == Environment.prod);
        return requestedCluster.withExclusivity(exclusive);
    }
Returns whether the nodes requested can share physical host with other applications
config-provisioning/src/main/java/com/yahoo/config/provision/CapacityPolicies.java