// i.e. default values will be applied to fields omitted in port-level traffic policies.
	return shadowCopyPortTrafficPolicy(portTrafficPolicy), true
}

// MergeSubsetTrafficPolicy merges the destination and subset level traffic policy for the given port.
func MergeSubsetTrafficPolicy(original, subsetPolicy *networking.TrafficPolicy, port *model.Port) *networking.TrafficPolicy {
	// First get DR port level traffic policy

	opts.mutable = subsetCluster
	opts.istioMtlsSni = defaultSni

	// If subset has a traffic policy, apply it so that it overrides the destination rule traffic policy.
	opts.policy = util.MergeSubsetTrafficPolicy(opts.policy, subset.TrafficPolicy, opts.port)

	if destRule != nil {
		destinationRule := CastDestinationRule(destRule)
		opts.isDrWithSelector = destinationRule.GetWorkloadSelector() != nil
	}