Use super to propagate processLumino/PhosphorMessage instead of skipping to the top of the prototype hierarchy immediately, in the migration guide.
Use super to propagate processLumino/PhosphorMessage instead of skipping to the top of the prototype hierarchy immediately, in the migration guide.

The code before would jump straight to the root class, rather than going up the hierarchy.
jupyter-widgets/ipywidgets,ipython/ipywidgets,ipython/ipywidgets,jupyter-widgets/ipywidgets,jupyter-widgets/ipywidgets,ipython/ipywidgets,jupyter-widgets/ipywidgets,ipython/ipywidgets,ipython/ipywidgets