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<?php use Symfony\Component\PropertyAccess\PropertyAccess; var_dump(PropertyAccess::class); var_dump(class_exists(PropertyAccess::class));
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(47) "Symfony\Component\PropertyAccess\PropertyAccess" bool(false)

preferences:
236.08 ms | 403 KiB | 283 Q