public function enterNode(Node $node)
    {
        if (!$node instanceof FuncCall && !$node instanceof MethodCall && !$node instanceof StaticCall) {
            return;
        }

        foreach ($node->args as $arg) {
            if ($arg->byRef) {
                throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, E_ERROR, null, $node->getLine());
            }
        }
    }