Layer
constructor(show: LayerEvents.ShowEvent, hide: LayerEvents.HideEvent, tileLoad: LayerEvents.TileLoadEvent, tileError: LayerEvents.TileErrorEvent, tileDiscard: LayerEvents.TileDiscardEvent, loadStart: LayerEvents.LoadStartEvent, loadComplete: LayerEvents.LoadCompleteEvent, paintChange: LayerEvents.PaintChangeEvent)