Playground execution failed:
error: /var/folders/yz/_w0qr7c93272s7btv_srrm340000gn/T/playground1-ea5875..swift:3:8: error: no such module 'RxSwift_Sources'
import RxSwift_Sources
^
Also there is strange error
/Users/andrewbatutin/Downloads/RxSwift_v1.1/11-time-based-operators/starter/RxSwiftPlayground/RxSwift.playground/Sources/TimelineViewBase.swift:120:59: Argument of '#selector' refers to instance method 'update' that is not exposed to Objective-C