import OLManager

enum YourCustomOverlays: OverlayLevelHolder { 
    case successOverlay
    case failurOverlay

    var level: YourCustomOverlays {
        switch self {
            case .successOverlay:
            return .global
            case .failurOverlay:
            return .local
        }
    }
}

final class OverlayFactoryImp: OverlayFactory {

    func makeOverlayWith(type: YourCustomOverlays) -> UIView {
        switch type {
            ...
        }
    }
}

final class OverlayManagerProvider {

    static let provider = OverlayManagerProvider()

    var overlayManager: OverlayManagerOf<OverlayFactoryImp>

    init() {
        let factory = OverlayFactoryImp()
        overlayManager = OverlayManagerOf<OverlayFactoryImp>(factory: factory)
    }
}

final class ViewController: BaseViewController {
    let overlayManager = OverlayManagerProvider.provider.overlayManager
    var overlayManageable: OverlayManageable?
    
    // MARK: UserInteraction
    @IBAction func testButtonAction(_ sender: Any) {
        let location = PinningLocation(horizontalEdge: .left, verticalEdge: .top)
        let config = OverlayDisplayConfiguration(animationType: .slide, pinningLocation: location)
        overlayManageable = overlayManager.displayOverlay(OverlayViewType.'your overlay type', configuration: config)
    }
}