code: def insert_in_next_line(tokens, index, string):
      
      tokenized_string = token_utils.listified_tokenizer(string)
      for i, tok in list(enumerate(tokens[index:])):
          token_type = tok[0]
          if token_type in [tokenize.NL, tokenize.NEWLINE]:
              for count, item in enumerate(tokenized_string):
                  tokens.insert(index+count+i+1, item)
              break
docs: Inserts the given string after the next newline inside tokens starting at
      *tokens[index]*.  Indents must be a list of indentation tokens that will
      preceeed the insert (can be an empty list).