Finalize executes any subclass-specific axes finalization steps.
        The user calls poof and poof calls finalize.

        Parameters
        ----------
        kwargs: generic keyword arguments.

def finalize(self, **kwargs):
        """
        Finalize executes any subclass-specific axes finalization steps.
        The user calls poof and poof calls finalize.

        Parameters
        ----------
        kwargs: generic keyword arguments.

        """
        # Set the title
        self.set_title(
            'RadViz for {} Features'.format(len(self.features_))
        )

        # Remove the ticks from the graph
        self.ax.set_yticks([])
        self.ax.set_xticks([])

        # Add the legend
        colors = [self._colors[c] for c in self.classes_]
        manual_legend(self, self.classes_, colors, loc='best')