ool, default True
            Area plots are stacked by default. Set to False to create a
            unstacked plot.
        **kwargs
            Additional keyword arguments are documented in
            :meth:`DataFrame.plot`.

        Returns
        -------
        matplotlib.axes.Axes or numpy.ndarray
            Area plot, or array of area plots if subplots is True.

        See Also
        --------
        DataFrame.plot : Make plots of DataFrame using matplotlib / pylab.

        Examples
        --------
        Draw an area plot based on basic business metrics:

        .. plot::
            :context: close-figs

            >>> df = pd.DataFrame({
            ...     'sales': [3, 2, 3, 9, 10, 6],
            ...     'signups': [5, 5, 6, 12, 14, 13],
            ...     'visits': [20, 42, 28, 62, 81, 50],
            ... }, index=pd.date_range(start='2018/01/01', end='2018/07/01',
            ...                        freq='M'))
            >>> ax = df.plot.area()

        Area plots are stacked by default. To produce an unstacked plot,
        pass ``stacked=False``:

        .. plot::
            :context: close-figs

            >>> ax = df.plot.area(stacked=False)

        Draw an area plot for a single column:

        .. plot::
            :context: close-figs

            >>> ax = df.plot.area(y='sales')

        Draw with a different `x`:

        .. plot::
            :context: close-figs

            >>> df = pd.DataFrame({
            ...     'sales': [3, 2, 3],
            ...     'visits': [20, 42, 28],
            ...     'day': [1, 2, 3],
            ... })
            >>> ax = df.plot.area(x='day')
        rL