Return a |PlaceholderGraphicFrame| object containing a new chart of
        *chart_type* depicting *chart_data* and having the same position and
        size as this placeholder. *chart_type* is one of the
        :ref:`XlChartType` enumeration values. *chart_data* is a |ChartData|
        object populated with the categories and series values for the chart.
        Note that the new |Chart| object is not returned directly. The chart
        object may be accessed using the
        :attr:`~.PlaceholderGraphicFrame.chart` property of the returned
        |PlaceholderGraphicFrame| object.

def insert_chart(self, chart_type, chart_data):
        """
        Return a |PlaceholderGraphicFrame| object containing a new chart of
        *chart_type* depicting *chart_data* and having the same position and
        size as this placeholder. *chart_type* is one of the
        :ref:`XlChartType` enumeration values. *chart_data* is a |ChartData|
        object populated with the categories and series values for the chart.
        Note that the new |Chart| object is not returned directly. The chart
        object may be accessed using the
        :attr:`~.PlaceholderGraphicFrame.chart` property of the returned
        |PlaceholderGraphicFrame| object.
        """
        rId = self.part.add_chart_part(chart_type, chart_data)
        graphicFrame = self._new_chart_graphicFrame(
            rId, self.left, self.top, self.width, self.height
        )
        self._replace_placeholder_with(graphicFrame)
        return PlaceholderGraphicFrame(graphicFrame, self._parent)