class_docstr: A data structure to represent a parse tree
class_docstr_tok: ["A","data","structure","to","represent","a","parse","tree"]
code: def depth(self):
      if not self.children:
          return 0
      return 1 + max(x.depth() for x in self.children)
  
imports: from collections import deque, Counter
  from enum import Enum
  from io import StringIO
  import itertools
  import re
  import warnings
  from stanza.models.common.stanza_object import StanzaObject
label_desc: Use image node_id 12 for calling the Tree obj's underlying member method code with example usage: obj.depth() and returns: unknown, int