class_docstr: Holds leaves and comments. Can be printed with `str(line)`.
class_docstr_tok: ["Holds","leaves","and","comments",".","Can","be","printed","with","`","str","(","line",")","`","."]
docstr: Is the line a triple quoted string?
code: def is_triple_quoted_string(self) -> bool:
      """Is the line a triple quoted string?"""
      if not self or self.leaves[0].type != token.STRING:
          return False
      value = self.leaves[0].value
      if value.startswith(('"""', "'''")):
          return True
      if (
          Preview.accept_raw_docstrings in self.mode
          and value.startswith(("r'''", 'r"""', "R'''", 'R"""'))
      ):
          return True
      return False
  
imports: import itertools
  import math
  from dataclasses import dataclass, field
  from typing import Callable, Dict, Iterator, List, Optional, Sequence, Tuple, TypeVar, Union, cast
  from black.brackets import COMMA_PRIORITY, DOT_PRIORITY, BracketTracker
  from black.mode import Mode, Preview
  from black.nodes import BRACKETS, CLOSING_BRACKETS, OPENING_BRACKETS, STANDALONE_COMMENT, TEST_DESCENDANTS, child_towards, is_docstring, is_funcdef, is_import, is_multiline_string, is_one_sequence_between, is_type_comment, is_type_ignore_comment, is_with_or_async_with_stmt, make_simple_prefix, replace_child, syms, whitespace
  from black.strings import str_width
  from blib2to3.pgen2 import token
  from blib2to3.pytree import Leaf, Node
label_desc: Use image node_id 12 for calling the Line obj's underlying member method code with example usage: obj.is_triple_quoted_string() and returns: False, False, True, True