Displays the HTML Map in a Jupyter notebook.

def _repr_html_(self, **kwargs):
        """Displays the HTML Map in a Jupyter notebook."""
        if self._parent is None:
            self.add_to(Figure())
            out = self._parent._repr_html_(**kwargs)
            self._parent = None
        else:
            out = self._parent._repr_html_(**kwargs)
        return out