private function appendInternal($unit, array &$stack)
    {
        $unit = $this->normalizeAssetPath($unit);

        array_push($stack, $unit);
        return $this;
    }
private function appendInternal($unit, array &$stack)
    {
        $unit = $this->normalizeAssetPath($unit);

        array_push($stack, $unit);
        return $this;
    }
private function appendInternal ( $ unit , array & $ stack ) { $ unit = $ this -> normalizeAssetPath ( $ unit ) ; array_push ( $ stack , $ unit ) ; return $ this ; }
Appends a unit

@param string $unit A path to unit
@return \Krystal\Application\View\PluginBag
Appends a unit