pub fn rewritten_relation_references(
views: &BTreeMap<RelationIdentity, StoredView>,
replacements: &BTreeMap<RelationIdentity, RelationIdentity>,
) -> Result<Vec<(RelationIdentity, StoredView)>, String>pub fn rewritten_relation_references(
views: &BTreeMap<RelationIdentity, StoredView>,
replacements: &BTreeMap<RelationIdentity, RelationIdentity>,
) -> Result<Vec<(RelationIdentity, StoredView)>, String>