func (r *ControllerDescriptor) IsCloudProviderController() bool {
	return r.isCloudProviderController
}

// RequiresSpecialHandling should return true only in a special non-generic controllers like ServiceAccountTokenController
func (r *ControllerDescriptor) RequiresSpecialHandling() bool {
	return r.requiresSpecialHandling
}

// KnownControllers returns all known controllers's name
func KnownControllers() []string {