@pre
<code>bt_stream_class_discarded_events_have_default_clock_snapshots(bt_stream_borrow_class_const(stream))</code>
returns #BT_TRUE.
+ \bt_p{beginning_clock_snapshot_value} ⩽ \bt_p{end_clock_snapshot_value}
@bt_post_success_frozen{stream}
*/
@pre
<code>bt_stream_class_discarded_packets_have_default_clock_snapshots(bt_stream_borrow_class_const(stream))</code>
returns #BT_TRUE.
+ \bt_p{beginning_clock_snapshot_value} ⩽ \bt_p{end_clock_snapshot_value}
@bt_post_success_frozen{stream}
*/