spec\PhpSpec\Matcher\ArrayKeyValueMatcherSpec::let PHP Method

    function let(Presenter $presenter)
    {
        $presenter->presentValue(Argument::any())->will(function ($subject) {
            if (is_array($subject[0])) {
                return 'array';
            }
            if (is_object($subject[0])) {
                return 'object';
            }
            return $subject[0];
        });
        $presenter->presentString(Argument::any())->willReturnArgument();
        $this->beConstructedWith($presenter);
    }