This is the next step to move from 1.9.3 to 2.1.2. - [ ] [`Neoid::Relationship._neo_save`](https://github.com/neoid-gem/neoid/blob/524523986f3b926a3b8face4204d3b4c338deddd/lib/neoid/relationship.rb#L112) - [ ] [`Neoid::Node.neo_model_index`](https://github.com/neoid-gem/neoid/blob/master/lib/neoid/node.rb#L36) - [ ] [`Neoid::Node.neo_subref_node`](https://github.com/neoid-gem/neoid/blob/master/lib/neoid/node.rb#L53) - [ ] [`Neoid::Node._neo_save`](https://github.com/neoid-gem/neoid/blob/524523986f3b926a3b8face4204d3b4c338deddd/lib/neoid/node.rb#L101) - [ ] [`Neoid::DatabaseCleaner.clean_db`](https://github.com/neoid-gem/neoid/blob/524523986f3b926a3b8face4204d3b4c338deddd/lib/neoid/database_cleaner.rb#L4)
