pzmudzinski

class DummyApi: Api {

    var userBooks = "Book 1", "Book 2", "Book 3"

    func getBooks() -> Observable<[Book]> {
        return userBooks
    }

    func deleteBook(_ book: Book) -> Single<Book> {
         ...wait 0.5s...

pzmudzinski

protocol Api {
    func getBooks() -> Observable<[Book]>
    func deleteBook(_ book: Book) -> Single<Book>
}

pzmudzinski

struct Book {
    let title: String
}