class_docstr: A result tracker which delegates to multiple different result trackers.
code: def log_metrics(
      self,
      metrics: Mapping[str, float],
      step: Optional[int] = None,
      prefix: Optional[str] = None,
  ) -> None:  # noqa: D102
      for tracker in self.trackers:
          tracker.log_metrics(metrics=metrics, step=step, prefix=prefix)
  
imports: import logging
  import re
  from collections import defaultdict
  from typing import Any, Iterable, List, Mapping, MutableMapping, Optional, Pattern, Union
  from tqdm.auto import tqdm
  from ..utils import flatten_dictionary
label_desc: Use image node_id 4 for calling the MultiResultTracker obj's underlying member method code with example usage: obj.log_metrics(metrics, step, prefix) without return types