BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
BT_ASSERT_PRE_EVENT_CLASS_HOT(event_class);
BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
BT_ASSERT_PRE_EVENT_CLASS_HOT(event_class);