code: def on_hover(self, callback, remove=False):
          '''
          The hover callback takes an unpacked set of keyword arguments.
          '''
          self._hover_callbacks.register_callback(callback, remove=removef on_hover(self, callback, remove=False):
          '''
          The hover callback takes an unpacked set of keyword arguments.
          '''
          self._hover_callbacks.register_callback(callback, remove=remove)
docs: The hover callback takes an unpacked set of keyword arguments.