code: def update_labels(self, func):
          
          if not isinstance(self.data, LabelArray):
              raise TypeError(
                  'update_labels only supported if data is of type LabelArray.'
              )
  
          # Map the baseline values.
          self._data = self._data.map(func)
  
          # Map each of the adjustments.
          for _, row_adjustments in iteritems(self.adjustments):
              for adjustment in row_adjustments:
                  adjustment.value = func(adjustment.value)
docs: Map a function over baseline and adjustment values in place.
  
          Note that the baseline data values must be a LabelArray.