extract method for clarity

Signal/src/ViewControllers/PhotoLibrary/PhotoCollectionPickerController.swift

@@ -81,12 +81,27 @@ class PhotoCollectionPickerController: OWSTableViewController, PhotoLibraryDeleg
         }
     }
 
+    // MARK: -
+
     private func updateContents() {
         photoCollections = library.allPhotoCollections()
 
-        let section = OWSTableSection()
-        for collection in photoCollections {
-            section.add(OWSTableItem.init(customCellBlock: { () -> UITableViewCell in
+        let sectionItems = photoCollections.map { collection in
+            return OWSTableItem(customCellBlock: { self.buildTableCell(collection: collection) },
+                                customRowHeight: UITableViewAutomaticDimension,
+                                actionBlock: { [weak self] in
+                                    guard let strongSelf = self else { return }
+                                    strongSelf.didSelectCollection(collection: collection)
+            })
+        }
+
+        let section = OWSTableSection(title: nil, items: sectionItems)
+        let contents = OWSTableContents()
+        contents.addSection(section)
+        self.contents = contents
+    }
+
+    func buildTableCell(collection: PhotoCollection) -> UITableViewCell {
         let cell = OWSTableItem.newCell()
 
         cell.backgroundColor = .ows_gray95
@@ -126,16 +141,6 @@ class PhotoCollectionPickerController: OWSTableViewController, PhotoLibraryDeleg
         stackView.ows_autoPinToSuperviewMargins()
 
         return cell
-            },
-                                          customRowHeight: UITableViewAutomaticDimension,
-                                          actionBlock: { [weak self] in
-                                            guard let strongSelf = self else { return }
-                                            strongSelf.didSelectCollection(collection: collection)
-            }))
-        }
-        let contents = OWSTableContents()
-        contents.addSection(section)
-        self.contents = contents
     }
 
     @objc