Swift Nested Calling : <pre><code>class BFCommon {
    class BFUser {

    }

    extension BFUser {
        static func sayHello() {
            print("Hello")
        }
    }
}

BFCommon.BFUser.sayHello
</code></pre>

<p>Need help fixing my code to call a function like so.</p>

<p>BFCommon.BFUser.sayHello</p>
