next_get_size (void *nxdata)
{
  struct b_conn *b_conn = nxdata;
  return b_conn->b->get_size (b_conn->b, b_conn->conn);
}
next_get_size (void *nxdata)
{
  struct b_conn *b_conn = nxdata;
  return b_conn->b->get_size (b_conn->b, b_conn->conn);
}