code: def __init__(self, *args, unkify_func=unkify, **kwargs):
      super().__init__(*args, **kwargs)
      self.unkify_func = unkify_func
      self.unk_num_token = VocabMeta.UNK_NUM_TOKEN
  
file_path: pytext/pytext/fields/text_field_with_special_unk.py
imports: from collections import Counter, OrderedDict
  from itertools import chain
  from typing import List, Optional, Tuple, Union
  import six
  import torch
  from pytext.common.constants import VocabMeta
  from pytext.fields import TextFeatureField
  from pytext.legacy import data
  from pytext.utils.data import is_number, unkify
label_desc: Use image node_id 1 to create a new TextFeatureFieldWithSpecialUnk object from inherited base classes: TextFeatureField with example: obj = TextFeatureFieldWithSpecialUnk()