code: def set_xlimits_widgets(self, set_min=True, set_max=True):
          
          xmin, xmax = self.tab_plot.ax.get_xlim()
          if set_min:
              self.w.x_lo.set_text('{0}'.format(xmin))
          if set_max:
              self.w.x_hi.set_text('{0}'.format(xmax))
docs: Populate axis limits GUI with current plot values.