pub fn diff_sets_in(
old: &[Package],
new: &[Package],
context: &[Package],
) -> DiffReportExpand description
diff_sets, with context: packages that a type reference resolves
against without being compared. The ridl CLI passes the built-in
ridl.std here, so a struct field appended with a ridl.std type is judged
by that type’s declaration (driftsys/ridl#598).