Setup DI container parent class

[BilboTav]

It was possible through specific parameters in Nette 2.3, why it was removed?
Is it possible somehow?

I have this piece of code implemented, which does what I need, but it is ugly hack. I would prefer a clean way.

    public function generateContainer(DI\Compiler $compiler)
    {
        $containerCode = parent::generateContainer($compiler);
        if (isset($this->containerParentClass)) {
            // Hack :-(
            $containerCode = str_replace('extends ' . DI\Container::class, 'extends ' . $this->containerParentClass, $containerCode);
        }

        return $containerCode;
    }

[dg]

It should be done by compiler extension. Can you send PR and implement it to the https://github.com/nette/di/blob/master/src/DI/Extensions/DIExtension.php?