 
     // MARK: Counter
 
+    /// Number of running activities
     public private(set) var counter = 0
     private let lock = NSLock()
 
-    /**
-     Increment counter & update network activity indicator
-     */
+    /// Increment counter & update network activity indicator
     public func increment() {
         lock.lock()
         defer { lock.unlock() }

        self.updateNetworkActivityIndicator()
    }

    /**
     Decrement counter & update network activity indicator
     */
    public func decrement() {
        lock.lock()
        defer { lock.unlock() }

        self.updateNetworkActivityIndicator()
    }

    /// Reset counter & update network activity indicator
    public func reset() {
        lock.lock()
        defer { lock.unlock() }
