):
    self._statistics = statistics
    self._calib_opts = calib_opts

  @abc.abstractmethod
  def get_min_max_value(self) -> tuple[float, float]:
    pass


class _HistogramCalibrationAlgorithmBase(_CalibrationAlgorithmBase):
  """Base class for histogram calibrators."""

  def __init__(
      self,
      statistics: calib_stats_pb2.CalibrationStatistics,