[TASK] Refactor code

$container->getChildRecords() only used for the condition. We can remove
this, because the new getAfterContainerRecord() returns the container
itself if ce has no children. We than can check if the uids are equal.
This improvement allows to extract the $sorting from the condition so we
only have the else block.

Classes/Integrity/SortingInPage.php

@@ -73,13 +73,10 @@ public function run(bool $dryRun = true, bool $enableLogging = false, ?int $pid
             foreach ($recordsPerPageAndColPos as $record) {
                 if (in_array($record['CType'], $cTypes, true)) {
                     $container = $this->containerFactory->buildContainer($record['uid']);
-                    $children = $container->getChildRecords();
-                    if (empty($children)) {
-                        $sorting = $record['sorting'];
-                    } else {
-                        $lastChild = $this->containerService->getAfterContainerRecord($container);
-                        $sorting = $lastChild['sorting'];
+                    $lastChild = $this->containerService->getAfterContainerRecord($container);
+                    $sorting = $lastChild['sorting'];
 
+                    if ($record['uid'] !== $lastChild['uid']) {
                         if ($prevChild === null || $prevContainer === null) {
                             $prevChild = $lastChild;
                             $prevContainer = $container;