Merge branch '7.3' into 7.4

* 7.3:
  Replace __sleep/wakeup() by __(un)serialize() for throwing and internal usages
  [TypeInfo] simplify identifier comparison in isIdentifiedBy method

Author: nicolas-grekas

Part/MessagePart.php

@@ -59,75 +59,12 @@ public function bodyToIterable(): iterable
 
     public function __serialize(): array
     {
-        if (self::class === (new \ReflectionMethod($this, '__sleep'))->class || self::class !== (new \ReflectionMethod($this, '__serialize'))->class) {
-            return ['message' => $this->message];
-        }
-
-        trigger_deprecation('symfony/mime', '7.4', 'Implementing "%s::__sleep()" is deprecated, use "__serialize()" instead.', get_debug_type($this));
-
-        $data = [];
-        foreach ($this->__sleep() as $key) {
-            try {
-                if (($r = new \ReflectionProperty($this, $key))->isInitialized($this)) {
-                    $data[$key] = $r->getValue($this);
-                }
-            } catch (\ReflectionException) {
-                $data[$key] = $this->$key;
-            }
-        }
-
-        return $data;
+        return ['message' => $this->message];
     }
 
     public function __unserialize(array $data): void
     {
-        if ($wakeup = self::class !== (new \ReflectionMethod($this, '__wakeup'))->class && self::class === (new \ReflectionMethod($this, '__unserialize'))->class) {
-            trigger_deprecation('symfony/mime', '7.4', 'Implementing "%s::__wakeup()" is deprecated, use "__unserialize()" instead.', get_debug_type($this));
-        }
-
-        if (\in_array(array_keys($data), [['message'], ["\0".self::class."\0message"]], true)) {
-            $this->message = $data['message'] ?? $data["\0".self::class."\0message"];
-
-            if ($wakeup) {
-                $this->__wakeup();
-            } else {
-                $this->__construct($this->message);
-            }
-
-            return;
-        }
-
-        trigger_deprecation('symfony/mime', '7.4', 'Passing more than just key "message" to "%s::__unserialize()" is deprecated, populate properties in "%s::__unserialize()" instead.', self::class, get_debug_type($this));
-
-        \Closure::bind(function ($data) use ($wakeup) {
-            foreach ($data as $key => $value) {
-                $this->{("\0" === $key[0] ?? '') ? substr($key, 1 + strrpos($key, "\0")) : $key} = $value;
-            }
-
-            if ($wakeup) {
-                $this->__wakeup();
-            } else {
-                $this->__construct($this->message);
-            }
-        }, $this, static::class)($data);
-    }
-
-    /**
-     * @deprecated since Symfony 7.4, will be replaced by `__unserialize()` in 8.0
-     */
-    public function __sleep(): array
-    {
-        trigger_deprecation('symfony/mime', '7.4', 'Calling "%s::__sleep()" is deprecated, use "__serialize()" instead.', get_debug_type($this));
-
-        return ['message'];
-    }
-
-    /**
-     * @deprecated since Symfony 7.4, will be replaced by `__unserialize()` in 8.0
-     */
-    public function __wakeup(): void
-    {
-        trigger_deprecation('symfony/mime', '7.4', 'Calling "%s::__wakeup()" is deprecated, use "__unserialize()" instead.', get_debug_type($this));
+        $this->message = $data['message'] ?? $data["\0".self::class."\0message"];
 
         $this->__construct($this->message);
     }