docs: def _draw_multiclass(self):
          """
          Draw the precision-recall curves in the multiclass case
          """
          # TODO: handle colors better with a mapping and user input
          if self.per_class:
              for cls in self.classes_:
                  precision = self.precision_[cls]
                  recall = self.recall_[cls]
  
                  label = "PR for class {} (area={:0.2f})".format(cls, self.score_[cls])
                  self._draw_pr_curve(recall, precision, label=label)
  
          if self.micro:
              precision = self.precision_[MICRO]
              recall = self.recall_[MICRO]
              self._draw_pr_curve(recall, precision)
  
          self._draw_ap_score(self.score_[MICRO])