code: def members(self) -> list[str] | None:
      here = self.getpos()
      if tkn := self.expect(lx.IDENTIFIER):
          members = [tkn.text]
          while self.expect(lx.COMMA):
              if tkn := self.expect(lx.IDENTIFIER):
                  members.append(tkn.text)
              else:
                  break
          peek = self.peek()
          if not peek or peek.kind != lx.RBRACE:
              raise self.make_syntax_error(
                  "Expected comma or right paren"
              )
          return members
      self.setpos(here)
      return None
  
imports: from dataclasses import dataclass, field
  from typing import NamedTuple, Callable, TypeVar, Literal, cast
  import lexer
  from plexer import PLexer
label_desc: Use image node_id 19 for calling the Parser obj's underlying member method code with example usage: obj.members() and returns: None, members