It looks like [this line](https://github.com/QuantStack/leaflet-splitmap/blob/ac32e852975c75b5ab855efb88836cd895703904/src/index.js#L73) is the cause of https://github.com/jupyter-widgets/ipyleaflet/issues/473: ``` Deprecated include of L.Mixin.Events: this property will be removed in future releases, please inherit from L.Evented instead. ``` The simplest thing I've seen for it would be: ```js includes: L.version[0]==='1' ? L.Evented.prototype : L.Mixin.Events, ```
It looks like this line is the cause of jupyter-widgets/ipyleaflet#473:
The simplest thing I've seen for it would be: