private Map<ClusterSpec.Id, Capacity> requestedCapacityIn(String instance, String region, String servicesXml, String deploymentXml) throws Exception {
        return requestedCapacityIn(null, Cloud.defaultCloud(), instance, region, servicesXml, deploymentXml);
    }
This implicitly creates one BCP group (which gives the same result as above).
config-model/src/test/java/com/yahoo/vespa/model/ClusterInfoTest.java