code: def residual_(self, label=None, style=None, opts=None):
          
          color, _ = self._get_color_size(style)
          try:
              fig = sns.residplot(self.df[self.x], self.df[self.y],
                                  lowess=True, color=color)
              fig = self._set_with_height(fig, opts)
              return fig
          except Exception as e:
              self.err(e, self.residual_,
                       "Can not draw models residuals chart")
docs: Returns a Seaborn models residuals chart