Append a ``<p:graphicFrame>`` shape containing a table as specified
        in call.

def add_table(self, id_, name, rows, cols, x, y, cx, cy):
        """
        Append a ``<p:graphicFrame>`` shape containing a table as specified
        in call.
        """
        graphicFrame = CT_GraphicalObjectFrame.new_table_graphicFrame(
            id_, name, rows, cols, x, y, cx, cy
        )
        self.insert_element_before(graphicFrame, 'p:extLst')
        return graphicFrame