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vendor/symfony/http-foundation/Exception/ConflictingHeadersException.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\HttpFoundation\Exception;
+
+/**
+ * The HTTP request contains headers with conflicting information.
+ *
+ * @author Magnus Nordlander <magnus@fervo.se>
+ */
+class ConflictingHeadersException extends \UnexpectedValueException implements RequestExceptionInterface
+{
+}

vendor/symfony/http-foundation/Exception/RequestExceptionInterface.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\HttpFoundation\Exception;
+
+/**
+ * Interface for Request exceptions.
+ *
+ * Exceptions implementing this interface should trigger an HTTP 400 response in the application code.
+ */
+interface RequestExceptionInterface
+{
+}

vendor/symfony/http-foundation/Exception/SuspiciousOperationException.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\HttpFoundation\Exception;
+
+/**
+ * Raised when a user has performed an operation that should be considered
+ * suspicious from a security perspective.
+ */
+class SuspiciousOperationException extends \UnexpectedValueException implements RequestExceptionInterface
+{
+}