class_docstr: A class that tracks the results from a pipeline run.
docstr: Start a run with an optional name.
docstr_tok: ["Start","a","run","with","an","optional","name","."]
code: def start_run(self, run_name: Optional[str] = None) -> None:
      """Start a run with an optional name."""
  
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 1 for calling the ResultTracker obj's underlying member method code with example usage: obj.start_run(run_name) without return types