code: def __contains__(self, sym: str) -> bool:
      return sym in self.table
  
imports: import re
  import typing
  from collections import Counter, deque
  from dataclasses import dataclass
  from bitarray import bitarray, util
  from fairseq.data import Dictionary
label_desc: Use image node_id 14 for calling the HuffmanCoder obj's underlying member method code with example usage: obj.__contains__(sym) and returns: unknown