private String createDistributionPartitions(int redundancyPerGroup, int numGroups) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < numGroups - 1; ++i) {
            sb.append(redundancyPerGroup);
            sb.append("|");
        }
        sb.append("*");
        return sb.toString();
    }
Class used to validate that hierarchic distribution is correctly setup when having an indexed content cluster.

Note that this class does not implement the com.yahoo.vespa.model.application.validation.Validator interface,
but is instead used in the context of com.yahoo.vespa.model.ConfigProducer.validate() such that it can be unit tested
without having to build the complete vespa model.

@author geirst
config-model/src/main/java/com/yahoo/vespa/model/content/IndexedHierarchicDistributionValidator.java