Syncs this object with the data store, maintaining object validity.

def Flush(self):
    """Syncs this object with the data store, maintaining object validity."""
    if self.locked and self.CheckLease() == 0:
      self._RaiseLockError("Flush")

    self._WriteAttributes()
    self._SyncAttributes()

    if self.parent:
      self.parent.Flush()