docs: def orientation(self):
          """
          The member of the ``WD_ORIENTATION`` enumeration corresponding to the
          value of the ``orient`` attribute of the ``<w:pgSz>`` child element,
          or ``WD_ORIENTATION.PORTRAIT`` if not present.
          """
          pgSz = self.pgSz
          if pgSz is None:
              return WD_ORIENTATION.PORTRAIT
          return pgSz.orient