/usr/share/php/Symfony/Component/HttpKernel/DataCollector/ is in php-symfony-http-kernel 3.4.6+dfsg-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/php/Symfony/Component/HttpKernel/DataCollector/AjaxDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/ConfigDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/DataCollectorInterface.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/EventDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/ExceptionDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/LateDataCollectorInterface.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/MemoryDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/RouterDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/TimeDataCollector.php
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/Util/
/usr/share/php/Symfony/Component/HttpKernel/DataCollector/Util/ValueExporter.php