Set same code with self link response

src/EmbedInterceptor.php

@@ -14,6 +14,7 @@
 use function array_shift;
 use function assert;
 use function is_array;
+use function is_string;
 use function uri_template;
 
 final class EmbedInterceptor implements MethodInterceptor
@@ -113,8 +114,14 @@ private function getArgsByInvocation(MethodInvocation $invocation): array
     public function linkSelf(Request $request, ResourceObject $ro): void
     {
         $result = $request();
-        foreach ($result as $key => $value) {
-            $ro->body[$key] = $value;
+        assert(is_array($result->body));
+        /** @var mixed $value */
+        foreach ($result->body as $key => $value) {
+            assert(is_string($key));
+            /** @psalm-suppress MixedArrayAssignment */
+            $ro->body[$key] = $value; // @phpstan-ignore-line
         }
+
+        $ro->code = $result->code;
     }
 }

tests/EmbedInterceptorTest.php

@@ -42,6 +42,7 @@ public function testSelfLink(): void
         $embeded = $this->resource->uri('app://self/bird/child')(['id' => 1]);
         $result = $this->resource->uri('app://self/bird/self-link')(['id' => 1]);
         $this->assertSame($result->body, $embeded->body);
+        $this->assertSame($result->code, $embeded->code);
     }
 
     public function testInvokeRelativePath(): BirdsRel

tests/Fake/FakeVendor/Sandbox/Resource/App/Bird/Child.php

@@ -8,6 +8,8 @@
 
 class Child extends ResourceObject
 {
+    public $code = 100;
+
     public function onGet(string $id)
     {
         $this->body = [