MathPHP\SetTheory\SetOperationsTest::dataProviderForIsProperSet PHP Метод

    public function dataProviderForIsProperSet()
    {
        return [[[], []], [[1], [1]], [[1, 2], [1, 2]], [[1, 3, 2], [1, 2, 3]], [[1, 2, 'a', 3, 4.5, new Set([1, 2])], [1, 2, 3, 'a', 4.5, new Set([1, 2])]], [[1, 2, 3, 'a', 4.5, new Set([1, 2])], [1, 2, 3, 'a', 4.5, new Set([1, 2])]], [[1, 2, 3, 'a', 4.5, new Set([1, 2]), -1, -2, 2.4, 3.5], [1, 2, 3, 'a', 4.5, new Set([1, 2]), -1, -2, 2.4, 3.5]]];
    }