Instead of an "Object Repository" we have our Element Repository instead
When a test project is loaded, all the elements from all tests are merged into the Element Repository, which then gets displayed in the Elements Explorer pane. It is important to know that this Element Repository is nothing more than an in-memory collection of all the elements. The repository, as a single collection, is not persisted to disk. It relies on the individual element definitions that are persisted with each test. During this merge process, any duplicate elements (i.e. the same element according to their Find Expressions) that are used by more than one test are merged and displayed as only one element in the Elements Explorer pane. Under the covers, the Element Repository knows which tests each element is used by.
You might find this article
very useful, because it will show you how we recommend to share resources between multiple projects.
Please let me know whether you have any additional questions.