/usr/share/php/Symfony/Component/ is in php-symfony-var-dumper 3.4.6+dfsg-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/php/Symfony/Component/VarDumper/
/usr/share/php/Symfony/Component/VarDumper/Caster/
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/usr/share/php/Symfony/Component/VarDumper/Caster/Caster.php
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/usr/share/php/Symfony/Component/VarDumper/Dumper/
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/usr/share/php/Symfony/Component/VarDumper/VarDumper.php
/usr/share/php/Symfony/Component/VarDumper/autoload.php