Models cannot be final because of NullModels

Models/KanbanBoard.php

@@ -22,7 +22,7 @@ namespace Modules\Kanban\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class KanbanBoard implements \JsonSerializable
+class KanbanBoard implements \JsonSerializable
 {
     private $id = 0;
 

Models/KanbanCard.php

@@ -24,7 +24,7 @@ use Modules\Media\Models\Media;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class KanbanCard implements \JsonSerializable
+class KanbanCard implements \JsonSerializable
 {
     private $id = 0;
 

Models/KanbanCardComment.php

@@ -24,7 +24,7 @@ use Modules\Media\Models\Media;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class KanbanCardComment implements \JsonSerializable
+class KanbanCardComment implements \JsonSerializable
 {
     private $id = 0;
 

Models/KanbanColumn.php

@@ -22,7 +22,7 @@ namespace Modules\Kanban\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class KanbanColumn implements \JsonSerializable
+class KanbanColumn implements \JsonSerializable
 {
     private $id = 0;
 

Models/KanbanLabel.php

@@ -24,7 +24,7 @@ use Modules\Media\Models\Media;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class KanbanLabel implements \JsonSerializable
+class KanbanLabel implements \JsonSerializable
 {
     private $id = 0;