/usr/include/seqan/bam_io/ is in libseqan2-dev 2.3.2+dfsg2-4ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/seqan/bam_io/bam_alignment_record.h
/usr/include/seqan/bam_io/bam_alignment_record_util.h
/usr/include/seqan/bam_io/bam_file.h
/usr/include/seqan/bam_io/bam_header_record.h
/usr/include/seqan/bam_io/bam_index_bai.h
/usr/include/seqan/bam_io/bam_io_context.h
/usr/include/seqan/bam_io/bam_sam_conversion.h
/usr/include/seqan/bam_io/bam_scanner_cache.h
/usr/include/seqan/bam_io/bam_tags_dict.h
/usr/include/seqan/bam_io/cigar.h
/usr/include/seqan/bam_io/read_bam.h
/usr/include/seqan/bam_io/read_sam.h
/usr/include/seqan/bam_io/write_bam.h
/usr/include/seqan/bam_io/write_sam.h