PHPSpec\Matcher\ScalarMatcher::getCheckerName PHP Метод

    private function getCheckerName($name)
    {
        if (0 !== strpos($name, 'be')) {
            return false;
        }
        $expected = lcfirst(substr($name, 2));
        if ($expected == 'boolean') {
            return 'is_bool';
        }
        return 'is_' . $expected;
    }