"istio.io/istio/pkg/config/schema/kind"
	"istio.io/istio/pkg/util/hash"
)

var (
	Separator = []byte{'~'}
	Slash     = []byte{'/'}
)

// clusterCache includes the variables that can influence a Cluster Configuration.
// Implements XdsCacheEntry interface.
type clusterCache struct {
	clusterName string

	// proxy related cache fields
	proxyVersion    string         // will be matched by envoyfilter patches

// as the non-subset and subset cluster generation are tightly coupled, in exchange for a likely trivial cache hit rate impact.
func (cb *ClusterBuilder) getAllCachedSubsetClusters(clusterKey clusterCache) ([]*discovery.Resource, bool) {
	if !features.EnableCDSCaching {
		return nil, false
	}
	destinationRule := CastDestinationRule(clusterKey.destinationRule.GetRule())