class_docstr: unigram/bigram LM, add-k smoothing
code: def getAllChars(self):
      return self.allChars
  
file_path: calamari/calamari_ocr/thirdparty/ctcwordbeamsearch/LanguageModel.py
imports: from __future__ import division
  from __future__ import print_function
  import re
  from .PrefixTree import PrefixTree
label_desc: Use image node_id 6 for calling the LanguageModel obj's underlying member method code with example usage: obj.getAllChars() and returns: self