Code Duplication    Length = 12-12 lines in 2 locations

src/Phpml/Math/Set.php 2 locations

@@ 54-65 (lines=12) @@
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     *
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     * @return Set[]
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     */
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    public static function cartesian(self $a, self $b): array
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    {
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        $cartesian = [];
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        foreach ($a as $multiplier) {
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            foreach ($b as $multiplicand) {
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                $cartesian[] = new self(array_merge([$multiplicand], [$multiplier]));
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            }
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        }
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        return $cartesian;
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    }
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    /**
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     * Creates the power set of A.
@@ 72-83 (lines=12) @@
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     *
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     * @return Set[]
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     */
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    public static function power(self $a): array
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    {
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        $power = [new self()];
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        foreach ($a as $multiplicand) {
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            foreach ($power as $multiplier) {
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                $power[] = new self(array_merge([$multiplicand], $multiplier->toArray()));
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            }
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        }
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        return $power;
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    }
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    /**
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     * @param string|int|float|bool $element