Refactor getAAD method return type from nullable to non-nullable string

performance/JWE/A128GCMKWBench.php

@@ -106,7 +106,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/A128KWBench.php

@@ -106,7 +106,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/A192GCMKWBench.php

@@ -106,7 +106,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/A192KWBench.php

@@ -106,7 +106,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/A256GCMKWBench.php

@@ -106,7 +106,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/A256KWBench.php

@@ -106,7 +106,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/ECDHESA128KWBench.php

@@ -220,7 +220,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/ECDHESA192KWBench.php

@@ -220,7 +220,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/ECDHESA256KWBench.php

@@ -220,7 +220,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/ECDHESBench.php

@@ -292,7 +292,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/PBES2HS256A128KWBench.php

@@ -106,7 +106,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/PBES2HS384A192KWBench.php

@@ -106,7 +106,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/PBES2HS512A256KWBench.php

@@ -106,7 +106,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/RSA1_5Bench.php

@@ -199,7 +199,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/RSAOAEP256Bench.php

@@ -199,7 +199,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

performance/JWE/RSAOAEPBench.php

@@ -199,7 +199,7 @@ public function dataRecipientPublicKeys(): array
     }
 
     #[Override]
-    protected function getAAD(): ?string
+    protected function getAAD(): string
     {
         return 'A,B,C,D';
     }

tests/Bundle/JoseFramework/TestBundle/Service/MockClientCallback.php

@@ -12,7 +12,7 @@ final class MockClientCallback extends MockHttpClient
 {
     private null|MockResponse $response = null;
 
-    public function __invoke(string $method, string $url, array $options = []): ?MockResponse
+    public function __invoke(string $method, string $url, array $options = []): MockResponse
     {
         if ($this->response === null) {
             throw new RuntimeException(sprintf(