static int buffer_is_empty(h2_bucket_beam *beam)
{
    return ((!beam->recv_buffer || APR_BRIGADE_EMPTY(beam->recv_buffer))
            && H2_BLIST_EMPTY(&beam->send_list));
}
static int buffer_is_empty(h2_bucket_beam *beam)
{
    return ((!beam->recv_buffer || APR_BRIGADE_EMPTY(beam->recv_buffer))
            && H2_BLIST_EMPTY(&beam->send_list));
}