code: def from_pb(cls, cell_pb):
          
          if cell_pb.labels:
              return cls(cell_pb.value, cell_pb.timestamp_micros, labels=cell_pb.labels)
          else:
              return cls(cell_pb.value, cell_pb.timestamp_micros)
docs: Create a new cell from a Cell protobuf.
  
          :type cell_pb: :class:`._generated.data_pb2.Cell`
          :param cell_pb: The protobuf to convert.
  
          :rtype: :class:`Cell`
          :returns: The cell corresponding to the protobuf.