change sender to notString value object

src/ValueObject/Sender.php

@@ -24,7 +24,7 @@ use libphonenumber\NumberParseException;
 use libphonenumber\PhoneNumberFormat;
 use libphonenumber\PhoneNumberUtil;
 
-class Sender extends StringValueObject
+class Sender extends ValueObject
 {
     /**
      * @param string $number

src/ValueObject/StringValueObject.php

@@ -19,13 +19,6 @@ use Assert\Assert;
 
 abstract class StringValueObject extends ValueObject
 {
-    public function __construct(string $number)
-    {
-        Assert::that($number)->notEmpty();
-
-        $this->value = $number;
-    }
-
     public function __toString()
     {
         return $this->get();
@@ -35,9 +28,4 @@ abstract class StringValueObject extends ValueObject
     {
         return $this->value;
     }
-
-    public function getFormatted()
-    {
-        return $this->get();
-    }
 }

src/ValueObject/ValueObject.php

@@ -15,7 +15,26 @@ declare(strict_types=1);
 
 namespace D3\LinkmobilityClient\ValueObject;
 
+use Assert\Assert;
+
 abstract class ValueObject
 {
     protected $value;
+
+    public function __construct(string $number)
+    {
+        Assert::that($number)->notEmpty();
+
+        $this->value = $number;
+    }
+
+    public function get()
+    {
+        return $this->value;
+    }
+
+    public function getFormatted()
+    {
+        return $this->get();
+    }
 }