code: def _is_probabilistic(self) -> bool:
      return self.likelihood is not None
  
file_path: darts/darts/models/forecasting/xgboost.py
imports: from functools import partial
  from typing import List, Optional, Sequence, Union
  import numpy
  import xgboost
  from darts.logging import get_logger
  from darts.models.forecasting.regression_model import FUTURE_LAGS_TYPE, LAGS_TYPE, RegressionModel, _LikelihoodMixin
  from darts.timeseries import TimeSeries
  from darts.utils.utils import raise_if_not
label_desc: Use image node_id 4 for calling the XGBModel obj's underlying member method code with example usage: obj._is_probabilistic() and returns: unknown