Adds the renderer object to cb_data so that you can identify which renderer invoked the callback from within the JS
@@ -292,7 +292,7 @@ export class HoverToolView extends InspectToolView
geometry['y'] = yscale.invert(geometry.vy)
callback = @model.callback
- [obj, data] = [callback, {index: indices, geometry: geometry}]
+ [obj, data] = [callback, {index: indices, geometry: geometry, renderer: r}]
if isFunction(callback)
callback(obj, data)
