MP_TRACE_f(MP_FUNC, "sending %s bucket\n",
MP_TRACE_f(MP_FUNC, MP_FILTER_NAME_FORMAT "write out: %s bucket\n", MP_FILTER_NAME(filter->f),
MP_INLINE apr_status_t modperl_input_filter_flush(modperl_filter_t *filter){    if (((modperl_filter_ctx_t *)filter->f->ctx)->sent_eos) {        /* no data should be sent after EOS has been sent */        return filter->rc;    }        if (filter->eos || filter->flush) {        MP_TRACE_f(MP_FUNC, "sending %s bucket\n",                   filter->eos ? "EOS" : "FLUSH");        filter->rc = filter->eos ?            send_input_eos(filter) : send_input_flush(filter);        /* modperl_brigade_dump(filter->bb_out, stderr); */        filter->flush = filter->eos = 0;    }        return filter->rc;}