workloadinstances

type Index interface {
	// Insert adds/updates given workload instance to the index.
	//
	// Returns previous value in the index, or nil otherwise.
	Insert(*model.WorkloadInstance) *model.WorkloadInstance
	// Delete removes given workload instance from the index.
	//
	// Returns value removed from the index, or nil otherwise.
	Delete(*model.WorkloadInstance) *model.WorkloadInstance
	// GetByIP returns a list of all workload instances associated with a
	// given IP address. The list is ordered by namespace/name.
	//
	// There are several use cases where multiple workload instances might
	// have the same IP address:
	// 1) there are multiple Istio Proxies running on a single host, e.g.
	//    in 'router' mode or even in 'sidecar' mode.
	// 2) workload instances have the same IP but different networks
	GetByIP(string) []*model.WorkloadInstance
	// Empty returns whether the index is empty.
	Empty() bool
	// ForEach iterates over all workload instances in the index.
	ForEach(func(*model.WorkloadInstance))
}

type MultiValueMap map[string]sets.String