docs: def copy(self, path):
          """ Make another snapshot of this into dirName. """
          directoryPath = os.path.dirname(path)
          if not os.path.exists(directoryPath):
              os.makedirs(directoryPath)
  
          logger.debug('Create copy of %s in %s', os.path.basename(path), directoryPath)
  
          with self._snapshot() as source, _Directory(directoryPath) as dest:
              dest.SNAP_CREATE_V2(
                  flags=BTRFS_SUBVOL_RDONLY,
                  name=str(os.path.basename(path)),
                  fd=source.fd,
              )
  
          with SnapShot(path) as destShot:
              flags = destShot.SUBVOL_GETFLAGS()
              destShot.SUBVOL_SETFLAGS(flags=flags.flags & ~BTRFS_SUBVOL_RDONLY)
  
              destShot.SET_RECEIVED_SUBVOL(
                  uuid=self.received_uuid or self.uuid,
                  stransid=self.sent_gen or self.current_gen,
                  stime=timeOrNone(self.info.stime) or timeOrNone(self.info.ctime) or 0,
                  flags=0,
              )
  
              destShot.SUBVOL_SETFLAGS(flags=flags.flags)