class_docstr: Base class for all anomaly models.
code: def fit(
      self, series: Union[TimeSeries, Sequence[TimeSeries]]
  ) -> Union[TimeSeries, Sequence[TimeSeries]]:
      pass
  
file_path: darts/darts/ad/anomaly_model/anomaly_model.py
imports: from abc import ABC, abstractmethod
  from typing import Dict, Sequence, Union
  from darts.ad.scorers.scorers import AnomalyScorer
  from darts.ad.utils import _to_list, eval_accuracy_from_scores, show_anomalies_from_scores
  from darts.logging import raise_if_not
  from darts.timeseries import TimeSeries
label_desc: Use image node_id 3 for calling the AnomalyModel obj's underlying member method code with example usage: obj.fit(series) without return types