diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index fdeefe7..27bce15 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -44,7 +44,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewStockList(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewStockList(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
 
@@ -89,7 +89,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewStock(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewStock(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
 
@@ -113,7 +113,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewStockLocationList(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewStockLocationList(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
 
@@ -158,7 +158,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewStockLocation(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewStockLocation(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
 
diff --git a/Models/StockLocationMapper.php b/Models/StockLocationMapper.php
index 9c7ed7e..cd0f439 100755
--- a/Models/StockLocationMapper.php
+++ b/Models/StockLocationMapper.php
@@ -44,7 +44,7 @@ final class StockLocationMapper extends DataMapperFactory
     /**
      * Belongs to.
      *
-     * @var array<string, array{mapper:string, external:string}>
+     * @var array<string, array{mapper:string, external:string, column?:string, by?:string}>
      * @since 1.0.0
      */
     public const BELONGS_TO = [
diff --git a/Models/StockShelfMapper.php b/Models/StockShelfMapper.php
index 452c985..8104c5c 100755
--- a/Models/StockShelfMapper.php
+++ b/Models/StockShelfMapper.php
@@ -44,7 +44,7 @@ final class StockShelfMapper extends DataMapperFactory
     /**
      * Belongs to.
      *
-     * @var array<string, array{mapper:string, external:string}>
+     * @var array<string, array{mapper:string, external:string, column?:string, by?:string}>
      * @since 1.0.0
      */
     public const BELONGS_TO = [