docs: def reset_counters(self):
          """
          Resets all counters, truth and classification masks.
          """
          self.truth_masks = None
          self.classification_masks = None
          self.pixel_truth_counts = None
          self.pixel_classification_counts = None
          self.pixel_truth_sum = None
          self.pixel_classification_sum = None
          self.val_df = None
          self.n_validation_sets = 0