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<?php

declare (strict_types=1);
namespace Rector\Naming\PhpArray;

final class ArrayFilter
{
    /**
     * @param mixed[] $values
     * @return string[]
     */
    public function filterWithAtLeastTwoOccurences(array $values) : array
    {
        /** @var array<string, int> $valueToCount */
        $valueToCount = \array_count_values($values);
        $duplicatedValues = [];
        foreach ($valueToCount as $value => $count) {
            /** @var int $count */
            if ($count < 2) {
                continue;
            }
            $duplicatedValues[] = $value;
        }
        return $duplicatedValues;
    }
}