code: def make_plotters(self):
          
          plotters, y = {}, 0
          for var_name in self.var_names:
              plotters[var_name] = VarHandler(
                  var_name,
                  self.data,
                  y,
                  model_names=self.model_names,
                  combined=self.combined,
                  colors=self.colors,
              )
              y = plotters[var_name].y_max()
          return plotters
docs: Initialize an object for each variable to be plotted.