public void validate() {
        validateThatWeHaveOneGroupLevel();
        validateThatLeafGroupsHasEqualNumberOfNodes();
        validateThatLeafGroupsCountIsAFactorOfRedundancy(redundancy.effectiveFinalRedundancy(), rootGroup.getSubgroups().size());
        validateThatRedundancyPerGroupIsEqual();
        validateThatReadyCopiesIsCompatibleWithRedundancy(redundancy.effectiveFinalRedundancy(), redundancy.effectiveReadyCopies(), rootGroup.getSubgroups().size());
    }
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