class_docstr: prefix tree
docstr: get all characters which may directly follow given text
docstr_tok: ["get","all","characters","which","may","directly","follow","given","text"]
code: def getNextChars(self, text):
      "get all characters which may directly follow given text"
      chars = []
      node = self.getNode(text)
      if node:
          for k in node.children.keys():
              chars.append(k)
      return chars
  
file_path: calamari/calamari_ocr/thirdparty/ctcwordbeamsearch/PrefixTree.py
imports: from __future__ import division
  from __future__ import print_function
label_desc: Use image node_id 6 for calling the PrefixTree obj's underlying member method code with example usage: obj.getNextChars(text) and returns: chars