// or new devices are reported, or old devices are deleted.
// Updated contains the most recent state of the Device.
type monitorCallback func(resourceName string, devices []pluginapi.Device)

func newMockPluginManager() *mockPluginManager {
	return &mockPluginManager{
		func(string) error { return nil },
		func(string, plugin.DevicePlugin) error { return nil },
		func(string) {},
		func(string, *pluginapi.ListAndWatchResponse) {},