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: Return True if we have a magic trailing comma, that is when:
  - there's a trailing comma here
  - it's not a one-tuple
  - it's not a single-element subscript
  Additionally, if ensure_removable:
  - it's not from square bracket indexing
  (specifically, single-element square bracket indexing)
code: def has_magic_trailing_comma(
      self, closing: Leaf, ensure_removable: bool = False
  ) -> bool:
      """Return True if we have a magic trailing comma, that is when:
      - there's a trailing comma here
      - it's not a one-tuple
      - it's not a single-element subscript
      Additionally, if ensure_removable:
      - it's not from square bracket indexing
      (specifically, single-element square bracket indexing)
      """
      if not (
          closing.type in CLOSING_BRACKETS
          and self.leaves
          and self.leaves[-1].type == token.COMMA
      ):
          return False
  
      if closing.type == token.RBRACE:
          return True
  
      if closing.type == token.RSQB:
          if (
              closing.parent is not None
              and closing.parent.type == syms.trailer
              and closing.opening_bracket is not None
              and is_one_sequence_between(
                  closing.opening_bracket,
                  closing,
                  self.leaves,
                  brackets=(token.LSQB, token.RSQB),
              )
          ):
              return False
  
          return True
  
      if self.is_import:
          return True
  
      if (
          closing.opening_bracket is not None
          and not is_one_sequence_between(
              closing.opening_bracket, closing, self.leaves
          )
      ):
          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 21 for calling the Line obj's underlying member method code with example usage: obj.has_magic_trailing_comma(closing, ensure_removable) and returns: False, False, True, True, True, True, False