code: def macro_def(self) -> Macro | None:
      if tkn := self.expect(lx.MACRO):
          if self.expect(lx.LPAREN):
              if tkn := self.expect(lx.IDENTIFIER):
                  if self.expect(lx.RPAREN):
                      if self.expect(lx.EQUALS):
                          if uops := self.uops():
                              self.require(lx.SEMI)
                              res = Macro(tkn.text, uops)
                              return res
      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 13 for calling the Parser obj's underlying member method code with example usage: obj.macro_def() and returns: None, res