10 files declare their use of NotNull in Plug 7

Abstract2Dot5ApiTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Validator/Abstract2Dot5ApiTest.php

AbstractConstraintValidatorTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Constraints/AbstractConstraintValidatorTest.php

AllValidatorTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Constraints/AllValidatorTest.php

AnnotationLoaderTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Mapping/Loader/AnnotationLoaderTest.php

CollectionValidatorTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Constraints/CollectionValidatorTest.php

CompositeTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php

EntityParent.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Fixtures/EntityParent.php

NotNullValidatorTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Constraints/NotNullValidatorTest.php

XmlFileLoaderTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php

YamlFileLoaderTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php