let bullet: String
if isRoot && (count == 0 || !willExpand) { bullet = "" }
else if count == 0 { bullet = "- " }
else if maxDepth <= 0 { bullet = "▹ " }
else { bullet = "▿ " }

let bullet = if isRoot && (count == 0 || !willExpand) { "" }
    else if count == 0 { "- " }
    else if maxDepth <= 0 { "▹ " }
    else { "▿ " }

public import PublicDependency

-enable-experimental-feature AccessLevelOnImport

-enable-experimental-feature InternalImportsByDefault

@Test("Check video metadata",
      .tags(.metadata))
func videoMetadata() {
    let video = Video(fileName: "By the Lake.mov")
    let expectedMetadata = Metadata(duration: .seconds(90))
    #expect(video.metadata == expectedMetadata)
}

@DebugDescription
struct WatchLaterItem {
    let video: Video
    let name: String
    let addedOn: Date

    var debugDescription: String {
        "\(name) - \(addedOn)"
    }
}

public func contains<T>(_ other: T) -> Bool where T : StringProtocol

public func contains(_ other: String) -> Bool

class FancyManagerOfSorts {
  let cache = Mutex<[String: Resource]>([:])
  
  func save(_ resource: Resource, as key: String) {
    cache.withLock {
      $0[key] = resource
    }
  }
}

extension Date: @retroactive Identifiable {
    // ...
}

extension Foundation.Date: Swift.Identifiable {
    // ...
}

static func validate(name: String) throws(ValidationError) {
  guard !name. isEmpty else {
    throw OtherError.validationFailed
        }
}

// Create a detail view controller for the selected item.
let detailViewController = MyDetailViewController(itemID: itemID)


// Set the preferred transition to zoom.
detailViewController.preferredTransition = .zoom { [self] _ in
    
    // Return the thumbnail view for the selected item.
    return thumbnail(for: itemID)
}


// Push the detail view controller onto the navigation stack.
navigationController?.pushViewController(detailViewController, animated: true)

0b00000011 | 0b00000101 // The bitwise OR operator produces 0b00000111
0b00000011 & 0b00000101 // The bitwise AND operator produces 0b00000001
0b00000010 << 1 // The bitwise LEFT SHIFT operator << produces 0b0000100
0b00000010 >> 1 // The bitwise RIGHT SHIFT operator >> produces 0b0000001

struct WeekdayOptions: OptionSet {
    let rawValue: Int

    static let sun = WeekdayOptions(rawValue: 1 << 0)
    static let sat = WeekdayOptions(rawValue: 1 << 1)
    static let fri = WeekdayOptions(rawValue: 1 << 2)
    static let thu = WeekdayOptions(rawValue: 1 << 3)
    static let wed = WeekdayOptions(rawValue: 1 << 4)
    static let tue = WeekdayOptions(rawValue: 1 << 5)
    static let mon = WeekdayOptions(rawValue: 1 << 6)
}