ossl_quic_txfc_consume_credit_local
int ossl_quic_txfc_consume_credit_local(QUIC_TXFC *txfc, uint64_t num_bytes);
int ok = ossl_quic_txfc_consume_credit_local(txfc, num_bytes);
if (!ossl_quic_txfc_consume_credit_local(txfc->parent, num_bytes))