 
 // MARK: - qos_class_t
 
-extension qos_class_t {
+public extension qos_class_t {
 
     // Convenience description of qos_class_t
 	// Calculated property


	/* cancel */

	func cancel() {
		dispatch_block_cancel(block)
	}
	

	/* wait */

	/// If optional parameter forSeconds is not provided, use DISPATCH_TIME_FOREVER
	public func wait(seconds: Double = 0.0) {
		if seconds != 0.0 {
			let nanoSeconds = Int64(seconds * Double(NSEC_PER_SEC))
			let time = dispatch_time(DISPATCH_TIME_NOW, nanoSeconds)
