Asset::groupCss

public function groupCss($from = '', $to = '')
{
	if (empty($from) || empty($to))
	{
		return;
	}

	$to = $this->movedCssTo($to);
	if (array_key_exists($from, $this->moduleInfo['CSS']))
	{
		$this->moduleInfo['CSS'][$from]['MODULE_ID'] = $to;
	}
	else
	{
		$this->moduleInfo['CSS'][$from] = ['MODULE_ID' => $to, 'FILES_INFO' => false];
	}

	foreach ($this->moduleInfo['CSS'] as $moduleID => $moduleInfo)
	{
		if($moduleInfo['MODULE_ID'] == $from)
		{
			$this->moduleInfo['CSS'][$moduleID]["MODULE_ID"] = $to;
		}
	}
}