code: def _normalize_headers(
      names: Mapping[str, Mapping[str, Any]], count: Mapping[str, int]
  ) -> List[str]:
      return [
          name if count[name] == 1 else f"{path}:{name}"
          for path in names
          for name in names[path]
      ]
  
imports: from collections import Counter, defaultdict
  from datetime import date, datetime
  from typing import TYPE_CHECKING, Any, Dict, Iterable, Iterator, List, Literal, Mapping, NamedTuple, Optional, Set, Tuple, Union
  from dvc.exceptions import InvalidArgumentError
  from dvc.log import logger
  from dvc.scm import Git
  from dvc.ui import ui
  from dvc.utils.flatten import flatten
  from .collect import collect
label_desc: Use image node_id 10 for calling a global function with example usage: _normalize_headers(names, count) and returns: unknown