Implement juyter.widget.control protocol #254
Merged
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A few changes to get this going.
The implementation is currently leaking, as are all currently all things created from the frontend, even after they are closed (owningxholder
s).Perhaps better to address that in a separate PR
A simple fix is proposed to manage comm closed by the front-end, but the fix is sensitive to Xeus modification.
The protocol implemented is the one used in IPyWidget, but not the one documented. Tracking in
jupyter-widgets/ipywidgets#3441