6 files declare their use of ClassMetadata in Zircon Profile 8

AnnotationLoaderTest.php in vendor/symfony/serializer/Tests/Mapping/Loader/AnnotationLoaderTest.php

ClassMetadataFactory.php in vendor/symfony/serializer/Mapping/Factory/ClassMetadataFactory.php

ClassMetadataTest.php in vendor/symfony/serializer/Tests/Mapping/ClassMetadataTest.php

TestClassMetadataFactory.php in vendor/symfony/serializer/Tests/Mapping/TestClassMetadataFactory.php

XmlFileLoaderTest.php in vendor/symfony/serializer/Tests/Mapping/Loader/XmlFileLoaderTest.php

YamlFileLoaderTest.php in vendor/symfony/serializer/Tests/Mapping/Loader/YamlFileLoaderTest.php