Added logs.

Author: ivanvorobei

Example Apps/SPDiffable.xcodeproj/project.xcworkspace/xcuserdata/ivanvorobei.xcuserdatad/UserInterfaceState.xcuserstate

@@ -91,25 +91,32 @@ open class SPDiffableCollectionDataSource: UICollectionViewDiffableDataSource<SP
             // In this case we shoudn't set header to section snapshot.
             // For this case it condition only.
             let headerAsFirstElement: Bool = {
+                print("collectionView: \(collectionView)")
                 if collectionView?.collectionViewLayout is UICollectionViewFlowLayout {
+                    print("return false")
                     return false
                 }
                 if collectionView?.collectionViewLayout is UICollectionViewCompositionalLayout {
+                    print("return true")
                     return true
                 }
+                print("return true 2")
                 return true
             }()
+            print("headerAsFirstElement \(headerAsFirstElement)")
 
             for section in sections {
                 var sectionSnapshot = SPDiffableSectionSnapshot()
 
                 if headerAsFirstElement {
+                    print("call as headerAsFirstElement")
                     let header = section.header
                     if let header = header {
                         sectionSnapshot.append([header])
                     }
                     sectionSnapshot.append(section.items, to: header)
                 } else {
+                    print("call as DONT headerAsFirstElement")
                     sectionSnapshot.append(section.items)
                 }