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vendor/symfony/mime/RawMessage.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mime;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @experimental in 4.3
+ */
+class RawMessage implements \Serializable
+{
+    private $message;
+
+    /**
+     * @param iterable|string $message
+     */
+    public function __construct($message)
+    {
+        $this->message = $message;
+    }
+
+    public function toString(): string
+    {
+        if (\is_string($this->message)) {
+            return $this->message;
+        }
+
+        return $this->message = implode('', iterator_to_array($this->message, false));
+    }
+
+    public function toIterable(): iterable
+    {
+        if (\is_string($this->message)) {
+            yield $this->message;
+
+            return;
+        }
+
+        $message = '';
+        foreach ($this->message as $chunk) {
+            $message .= $chunk;
+            yield $chunk;
+        }
+        $this->message = $message;
+    }
+
+    /**
+     * @internal
+     */
+    final public function serialize()
+    {
+        return serialize($this->__serialize());
+    }
+
+    /**
+     * @internal
+     */
+    final public function unserialize($serialized)
+    {
+        $this->__unserialize(unserialize($serialized));
+    }
+
+    public function __serialize(): array
+    {
+        return [$this->message];
+    }
+
+    public function __unserialize(array $data): void
+    {
+        [$this->message] = $data;
+    }
+}