code: func (c *Client) OpenDatagramStream(prefix, path logdog_types.StreamName, flags ...*streamproto.Flags) (*Stream, error) {
  	return c.open(logpb.StreamType_DATAGRAM, prefix, path, flags...)
  }
docs: // OpenDatagramStream returns a stream for datagrams.
  //
  // Each Write will produce a single complete datagram in the stream.