plan

type Changes struct {
	// Records that need to be created
	Create []endpoint.Endpoint
	// Records that need to be updated (current data)
	UpdateOld []endpoint.Endpoint
	// Records that need to be updated (desired data)
	UpdateNew []endpoint.Endpoint
	// Records that need to be deleted
	Delete []endpoint.Endpoint
}

type Plan struct {
	// List of current records
	Current []endpoint.Endpoint
	// List of desired records
	Desired []endpoint.Endpoint
	// List of changes necessary to move towards desired state
	// Populated after calling Calculate()
	Changes Changes
}