code: def is_sharded_file_spec(spec: str) -> bool:
      """Returns True if spec is a sharded file specification."""
      m = SHARD_SPEC_PATTERN.match(spec)
      return m is not None
  
file_path: scenic/scenic/projects/vivit/data/file_utils.py
imports: import math
  import re
  from typing import Iterator, Tuple
label_desc: Use image node_id 4 for calling a global function with example usage: is_sharded_file_spec(spec) and returns: unknown