/usr/share/php/ApiGen/Generator/TemplateGenerators/ is in php-apigen 4.1.2-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/ApiGen/Generator/TemplateGenerators/AnnotationGroupsGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/ClassElementGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/CombinedGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/ConstantElementGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/E404Generator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/ElementListGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/FunctionElementGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/Loaders/
/usr/share/php/ApiGen/Generator/TemplateGenerators/Loaders/NamespaceAndPackageLoader.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/NamespaceGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/OpensearchGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/OverviewGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/PackageGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/RobotsGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/SitemapGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/SourceCodeGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/TreeGenerator.php
/usr/share/php/ApiGen/Generator/TemplateGenerators/ZipGenerator.php