docs: def parse_or_die(self, args=None):
          """Like :meth:`ParseKeywords.parse`, but calls :func:`pkwit.cli.die` if a
          :exc:`KwargvError` is raised, printing the exception text. Returns
          *self* for convenience.
  
          """
          from .cli import die
  
          try:
              return self.parse(args)
          except KwargvError as e:
              die(e)