public function loadFile(string $filename): array
    {
        if (!is_readable($filename)) {
            throw new \RuntimeException('The file "' . $filename . '" is not readable.');
        }

        $content = file_get_contents($filename);

        return $this->loadString($content);
    }
public function loadFile(string $filename): array
    {
        if (!is_readable($filename)) {
            throw new \RuntimeException('The file "' . $filename . '" is not readable.');
        }

        $content = file_get_contents($filename);

        return $this->loadString($content);
    }
{@inheritdoc}