public function loadJson(string $fixturePath): string
    {
        if (!file_exists($fixturePath)) {
            throw new FixtureLoaderEx("Fixture $fixturePath does not exist.");
        }

        $lines = file($fixturePath);
        $endLine = -1;
        foreach ($lines as $lineNo => $data) {
            if (substr($data, 0, 2) === '--') {
                $endLine = $lineNo;
            } else {
                break;
            }
        }

        if ($endLine != -1) {
            array_splice($lines, 0, $endLine + 1);
        }

        return implode("\n", $lines);
    }