code: def get_sync_info(self, name, key=None):
          
          peer_target = self.peer
          if self.is_local():
              info = self.cur_dir_meta.dir["peer_sync"].get(peer_target.get_id())
          else:
              info = peer_target.cur_dir_meta.dir["peer_sync"].get(self.get_id())
          if name is not None:
              info = info.get(name) if info else None
          if info and key:
              info = info.get(key)
          return info
docs: Get mtime/size when this target's current dir was last synchronized with remote.