docs: def abs_path(self, uuid):
          # type: (UUID) -> Path
          """Return absolute :class:`Path` object for given uuid.
  
          :param:uuid: :class:`UUID` instance
          """
          top = self.app_state.path
          rel_path = self.rel_path(uuid)
          dest = top / rel_path
          assert top in dest.parents
          return dest