/usr/share/php/Symfony/ is in php-symfony-options-resolver 2.7.10-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Symfony/Component/
/usr/share/php/Symfony/Component/OptionsResolver/
/usr/share/php/Symfony/Component/OptionsResolver/Exception/
/usr/share/php/Symfony/Component/OptionsResolver/Exception/AccessException.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/ExceptionInterface.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/InvalidArgumentException.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/InvalidOptionsException.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/MissingOptionsException.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/NoSuchOptionException.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/OptionDefinitionException.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/UndefinedOptionsException.php
/usr/share/php/Symfony/Component/OptionsResolver/Options.php
/usr/share/php/Symfony/Component/OptionsResolver/OptionsResolver.php
/usr/share/php/Symfony/Component/OptionsResolver/OptionsResolverInterface.php
/usr/share/php/Symfony/Component/OptionsResolver/autoload.php