Fixed some deprecation messages

src/DataTables/Column/RowClassColumn.php

@@ -48,6 +48,9 @@ class RowClassColumn extends AbstractColumn
         parent::initialize('$$rowClass', $index, $options, $dataTable); // TODO: Change the autogenerated stub
     }
 
+    /**
+     * @return mixed
+     */
     public function normalize($value)
     {
         return $value;

src/DataTables/Column/SIUnitNumberColumn.php

@@ -43,7 +43,7 @@ class SIUnitNumberColumn extends AbstractColumn
         return $this;
     }
 
-    public function normalize($value)
+    public function normalize($value): string
     {
         //Ignore null values
         if ($value === null) {

src/DataTables/Column/SelectColumn.php

@@ -43,6 +43,9 @@ class SelectColumn extends AbstractColumn
         return $this;
     }
 
+    /**
+     * @return mixed
+     */
     public function normalize($value)
     {
         return $value;

src/Entity/UserSystem/PermissionData.php

@@ -203,9 +203,9 @@ final class PermissionData implements \JsonSerializable
 
     /**
      * Returns an JSON encodable representation of this object.
-     * @return array|mixed
+     * @return array
      */
-    public function jsonSerialize()
+    public function jsonSerialize(): array
     {
         $ret = [];
 

src/Serializer/PartNormalizer.php

@@ -58,7 +58,7 @@ class PartNormalizer implements NormalizerInterface, DenormalizerInterface, Cach
         return $data instanceof Part;
     }
 
-    public function normalize($object, string $format = null, array $context = [])
+    public function normalize($object, string $format = null, array $context = []): array
     {
         if (!$object instanceof Part) {
             throw new \InvalidArgumentException('This normalizer only supports Part objects!');
@@ -94,7 +94,7 @@ class PartNormalizer implements NormalizerInterface, DenormalizerInterface, Cach
         return $data;
     }
 
-    public function denormalize($data, string $type, string $format = null, array $context = [])
+    public function denormalize($data, string $type, string $format = null, array $context = []): ?Part
     {
         $this->normalizeKeys($data);
 

src/Serializer/StructuralElementDenormalizer.php

@@ -51,7 +51,7 @@ class StructuralElementDenormalizer implements ContextAwareDenormalizerInterface
             && in_array('import', $context['groups'] ?? []);
     }
 
-    public function denormalize($data, string $type, string $format = null, array $context = [])
+    public function denormalize($data, string $type, string $format = null, array $context = []): ?AbstractStructuralDBElement
     {
         /** @var AbstractStructuralDBElement $deserialized_entity */
         $deserialized_entity = $this->normalizer->denormalize($data, $type, $format, $context);

src/Serializer/StructuralElementFromNameDenormalizer.php

@@ -42,7 +42,7 @@ class StructuralElementFromNameDenormalizer implements DenormalizerInterface, Ca
         return is_string($data) && is_subclass_of($type, AbstractStructuralDBElement::class);
     }
 
-    public function denormalize($data, string $type, string $format = null, array $context = [])
+    public function denormalize($data, string $type, string $format = null, array $context = []): ?AbstractStructuralDBElement
     {
         //Retrieve the repository for the given type
         /** @var StructuralDBElementRepository $repo */

src/Serializer/StructuralElementNormalizer.php

@@ -41,7 +41,7 @@ class StructuralElementNormalizer implements NormalizerInterface, CacheableSuppo
         return $data instanceof AbstractStructuralDBElement;
     }
 
-    public function normalize($object, string $format = null, array $context = [])
+    public function normalize($object, string $format = null, array $context = []): array
     {
         if (!$object instanceof AbstractStructuralDBElement) {
             throw new \InvalidArgumentException('This normalizer only supports AbstractStructural objects!');