code: def available_labels(self):
          
          try:
              assert self.mode == "classification"
          except AssertionError:
              raise NotImplementedError('Not supported for regression explanations.')
          else:
              ans = self.top_labels if self.top_labels else self.local_exp.keys()
              return list(ans)
docs: Returns the list of classification labels for which we have any explanations.