     func sectionClosed(sectionElement: ALSectionElement)
 }
 
-class ALSectionElement: NSObject {
-    
+class ALSectionElement {
+
     //MARK: - Properties
     
     private let viewHeader: UIView

    }
}

































        self.footerHeight = footerHeight
        self.isExpandable = isExpandable
        self.rowElements = rowElements
        self.setUpHeaderRecognizer()
    }
    
