let private_object = new_object()
    .title("Alice's Private Object")
    .description("This object can only be seen and modified by Alice")
    .save_object();

let object_shared_with_bob = new_object()
    .title("Alice's Shared Object")
    .description("This object can be seen by Bob but modified only by Alice")
    .save_object();

let new_access = new_access()
    .object_id(object_shared_with_bob.id())
    .circle_public_key("bob_pk")
    .save_access();

let book_private = new_book()
    .title("Alice's private book")
    .description("This book is prive to Alice")
    .save_book();

let slides_shared = new_slides()
    .title("Alice's shared slides")
    .description("These slides, despite being in a private collection, are shared with Bob")
    .save_slides();

let new_access = new_access()
    .object_id(slides_shared.id)
    .circle_public_key("bob_pk")
    .save_access();

let collection_private = new_collection()
    .title("Alice's private collection")
    .description("This collection is only visible to Alice")
    .add_book(book_private.id)
    .add_slides(slides_shared.id)
    .save_collection();


let collection_shared = new_collection()
    .title("Alice's shared collection")
    .description("This collection is shared with Bob")
    .save_collection();