added to a trace class yet or on error.
@prenotnull{stream_class}
+@postrefcountsame{stream_class}
@postsuccessrefcountretinc
@sa bt_ctf_trace_add_stream_class(): Add a stream class to
or \c NULL on error.
@prenotnull{stream_class}
+@postrefcountsame{stream_class}
@postsuccessrefcountretinc
@sa bt_ctf_stream_class_set_packet_context_type(): Sets the packet
or \c NULL on error.
@prenotnull{stream_class}
+@postrefcountsame{stream_class}
@postsuccessrefcountretinc
@sa bt_ctf_stream_class_set_event_header_type(): Sets the event
\p stream_class, or \c NULL on error.
@prenotnull{stream_class}
+@postrefcountsame{stream_class}
@postsuccessrefcountretinc
@sa bt_ctf_stream_class_set_event_context_type(): Sets the per-stream