/usr/include/seqan/journaled_set/ is in libseqan2-dev 2.3.1+dfsg-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/seqan/journaled_set/journal_alignment_interface.h
/usr/include/seqan/journaled_set/journal_alignment_traceback_adaptor.h
/usr/include/seqan/journaled_set/journaled_set_base.h
/usr/include/seqan/journaled_set/journaled_set_impl.h
/usr/include/seqan/journaled_set/journaled_set_join.h
/usr/include/seqan/journaled_set/journaled_set_join_config.h
/usr/include/seqan/journaled_set/journaled_set_join_global_align_compact.h
/usr/include/seqan/journaled_set/journaled_set_join_global_align_manhatten.h
/usr/include/seqan/journaled_set/journaled_set_journal_trace_descriptor.h
/usr/include/seqan/journaled_set/score_biaffine.h