code: def firstIntegerPredicate(field: str) -> FrozenSet[str]:
      first_token = start_integer(field)
      if first_token:
          return frozenset(first_token.groups())
      else:
          return frozenset()
  
imports: import re
  from itertools import chain
  from math import copysign, floor, log10
  from typing import Any, FrozenSet, Sequence, Tuple, Union
  from doublemetaphone import doublemetaphone
  from dedupe.cpredicates import initials, ngrams, unique_ngrams
label_desc: Use image node_id 10 for calling a global function with example usage: firstIntegerPredicate(field) and returns: frozenset, frozenset