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<?php $classes = get_declared_classes(); $enums = array_filter( $classes, enum_exists(...) ); var_dump( $enums );
Output for git.master_jit, git.master
array(4) { [49]=> string(20) "Dom\AdjacentPosition" [162]=> string(23) "Random\IntervalBoundary" [187]=> string(16) "PropertyHookType" [190]=> string(12) "RoundingMode" }

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