 
         let imageViewY = CGFloat(10)
         let imageViewHeight = self.contentView.bounds.height - 2 * imageViewY
-        self.thumbnailImageView.frame = CGRect(x: imageViewY, y: imageViewY,
-                                               width: imageViewHeight, height: imageViewHeight)
-
-        self.groupNameLabel.frame = CGRect(x: self.thumbnailImageView.frame.maxX + 10, y: self.thumbnailImageView.frame.minY + 5,
-                                           width: 200, height: 20)
-
-        self.totalCountLabel.frame = CGRect(x: self.groupNameLabel.frame.minX, y: self.thumbnailImageView.frame.maxY - 20, width: 200, height: 20)
-    }
-
+        self.thumbnailImageView.frame = CGRect(x: imageViewY,
+                                               y: imageViewY,
+                                               width: imageViewHeight,
+                                               height: imageViewHeight)
+
+        self.groupNameLabel.frame = CGRect(
+            x: self.thumbnailImageView.frame.maxX + 10,
+            y: self.thumbnailImageView.frame.minY + 5,
+            width: 200,
+            height: 20)
+
+        self.totalCountLabel.frame = CGRect(
+            x: self.groupNameLabel.frame.minX,
+            y: self.thumbnailImageView.frame.maxY - 20,
+            width: 200,
+            height: 20)
+    }
 }
 
 class DKAssetGroupListVC: UITableViewController, DKGroupDataManagerObserver {

    override var preferredContentSize: CGSize {
        get {
            if let groups = self.groups {
                return CGSize(width: UIViewNoIntrinsicMetric, height: CGFloat(groups.count) * self.tableView.rowHeight)
            } else {
                return super.preferredContentSize
            }


    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let groups = groups,
            let cell = tableView.dequeueReusableCell(
                withIdentifier: DKImageGroupCellIdentifier,
                for: indexPath) as? DKAssetGroupCell else
        {
            assertionFailure("Expect groups and cell")
            return UITableViewCell()
