Initializes the artist based on the plot method declared on
        the plot.

def init_artists(self, ax, plot_args, plot_kwargs):
        """
        Initializes the artist based on the plot method declared on
        the plot.
        """
        plot_method = self._plot_methods.get('batched' if self.batched else 'single')
        plot_fn = getattr(ax, plot_method)
        artist = plot_fn(*plot_args, **plot_kwargs)
        return {'artist': artist[0] if isinstance(artist, list) and
                len(artist) == 1 else artist}