Make util classes not instantiable

Author: ecastro98

src/Utils/Input.php

@@ -15,11 +15,11 @@
 
 namespace MultiTheftAuto\Sdk\Utils;
 
-class Input
+abstract class Input
 {
     public static function get(): ?string
     {
         $input = file_get_contents('php://input');
-        return $input?? null;
+        return $input? $input : null;
     }
 }

src/Utils/Translator.php

@@ -18,13 +18,15 @@
 use MultiTheftAuto\Sdk\Model\Element;
 use MultiTheftAuto\Sdk\Model\Resource;
 
-class Translator
+abstract class Translator
 {
-    public static function fromServer(string $dataFromServer): array
+    public static function fromServer(?string $dataFromServer): ?array
     {
-        $dataFromServer = json_decode($dataFromServer, true);
-        foreach ($dataFromServer as &$value) {
-            Translator::stringValuesToObjects($value);
+        if (!empty($dataFromServer)) {
+            $dataFromServer = json_decode($dataFromServer, true);
+            foreach ($dataFromServer as &$value) {
+                Translator::stringValuesToObjects($value);
+            }
         }
 
         return $dataFromServer;