code: def search(self, word: str) -> bool:
      """
      Returns if the word is in the data structure. A word could contain the dot character '.' to represent any letter.
      """
  
      def search_in_node(word, node) -> bool:
          for i, ch in enumerate(word):
              if not ch in node:
                  # if the current character is '.'
                  # check all possible nodes at this level
                  if ch == ".":
                      for x in node:
                          if x != "$" and search_in_node(
                              word[i + 1 :], node[x]
                          ):
                              return True
                  # if no nodes lead to answer
                  # or the current character != '.'
                  return False
              # if the character is found
              # go down to the next level in trie
              else:
                  node = node[ch]
          return "$" in node
  
      return search_in_node(word, self.trie)
  
label_desc: Use image node_id 3 for calling the WordDictionary obj's underlying member method code with example usage: obj.search(word) and returns: search_in_node, unknown, False, True