Devise\Pages\Interpreter\DeviseParser::__construct PHP Method

    public function __construct(Parser $parser = null)
    {
        $className = '\\PhpParser\\ParserFactory';
        if (class_exists($className)) {
            $this->parser = (new \PhpParser\ParserFactory())->create(\PhpParser\ParserFactory::PREFER_PHP7);
        } else {
            $this->parser = $parser ?: new \PhpParser\Parser(new \PhpParser\Lexer());
        }
    }