- prolog:xref_source_identifier(+Src, -Id) is semidet[multifile, swish(lib/include)]
- prolog:xref_open_source(+File, -Stream) is det[multifile, swish(lib/include)]
- prolog:xref_source_time(+File, -Modified) is det[multifile, swish(lib/include)]
- Map swish://file to a file from the gitty store.