def AddRowFromFd(self, index, fd):
    """Add a new value from the fd."""
    value = fd.Get(self.attribute)
    try:
      # Unpack flows that are stored inside tasks.
      value = value.Payload()
    except __HOLE__:
      pass
    if value is not None:
      self.rows[index] = value
dataset/ETHPy150Open google/grr/grr/gui/plugins/semantic.py/AttributeColumn.AddRowFromFd