for k := range cfgs {
		if !deltaConfigTypes.Contains(k.Kind.String()) {
			return false
		}
	}
	return true
}

// buildOutboundClusters generates all outbound (including subsets) clusters for a given proxy.
func (configgen *ConfigGeneratorImpl) buildOutboundClusters(cb *ClusterBuilder, proxy *model.Proxy, cp clusterPatcher,
	services []*model.Service,
) ([]*discovery.Resource, cacheStats) {