BT_ASSERT_PRE(sc->default_clock_class,
"Packet's stream class has no default clock class: "
"%![packet-]+a, %![sc-]+S", packet, sc);
BT_ASSERT_PRE(sc->default_clock_class,
"Packet's stream class has no default clock class: "
"%![packet-]+a, %![sc-]+S", packet, sc);