fn insert_into_canonical_map<'db>(
db: &'db dyn Db,
canonical_map: &mut Map<Identifier<'db>, Span<'db>>,
map: &Map<Identifier<'db>, impl Spanned<'db>>,
)fn insert_into_canonical_map<'db>(
db: &'db dyn Db,
canonical_map: &mut Map<Identifier<'db>, Span<'db>>,
map: &Map<Identifier<'db>, impl Spanned<'db>>,
)