code: def lca(self, iso1, iso2):
      node1 = self.iso2node[iso1]
      node2 = self.iso2node[iso2]
      if iso1 == iso2:
          return node1.level, node1.name
  
      anc1 = node1.get_ancestors()
      anc2 = node2.get_ancestors()
      st = 0
      while 1:  # Should correctly terminate if iso1 != iso2
          if anc1[st] == anc2[st]:
              st += 1
          else:
              break
      return st - 1, anc1[st - 1].name
  
imports: import json
  from typing import Dict, List, Union
label_desc: Use image node_id 7 for calling the LanguageTree obj's underlying member method code with example usage: obj.lca(iso1, iso2) and returns: unknown,  anc1, node1,  node1