return keys[i].Provider < keys[j].Provider
		})
	}
	return keys
}

// CopyEndpoints takes a snapshot of all endpoints. As input, it takes a map of port name to number, to allow it to group
// the results by service port number. This is a bit weird, but lets us efficiently construct the format the caller needs.
func (es *EndpointShards) CopyEndpoints(portMap map[string]int, ports sets.Set[int]) map[int][]*IstioEndpoint {
	es.RLock()

			ps.ServiceIndex.instancesByPort[svcKey] = make(map[int][]*IstioEndpoint)
		}
		shards, ok := env.EndpointIndex.ShardsForService(string(s.Hostname), s.Attributes.Namespace)
		if ok {
			instancesByPort := shards.CopyEndpoints(portMap, ports)
			// Iterate over the instances and add them to the service index to avoid overiding the existing port instances.
			for port, instances := range instancesByPort {