MathPHP\SetTheory\ImmutableSetTest::testRemoveMultiDoesNothing PHP Метод

    public function testRemoveMultiDoesNothing()
    {
        $A = new ImmutableSet([1, 2, 3, 4]);
        $B = $A->copy();
        $A->removeMulti([1]);
        $A->removeMulti([2, 3]);
        $this->assertEquals($B, $A);
        $this->assertEquals($B->asArray(), $A->asArray());
    }