private static NewDocumentType getDocumentType(ContentCluster cluster, DocumentDatabase db) {
        return cluster.getDocumentDefinitions().get(db.getName());
    }
Validates the changes between all current and next streaming search clusters in a Vespa model.

@author geirst
config-model/src/main/java/com/yahoo/vespa/model/application/validation/change/StreamingSearchClusterChangeValidator.java