NsplTest\FTest::testFlipped PHP Method

    public function testFlipped()
    {
        $f = function ($a, $b, $c) {
            return $a . $b . $c;
        };
        $flippedF = flipped($f);
        $this->assertEquals('cba', $flippedF('a', 'b', 'c'));
        $flippedF = call_user_func(flipped, $f);
        $this->assertEquals('cba', $flippedF('a', 'b', 'c'));
        $this->assertEquals('\\nspl\\f\\flipped', flipped);
    }