ConfigurableRestApp::getIcon

public function getIcon(): ?Icon
{
	$icon = parent::getIcon();
	if (!$icon)
	{
		return null;
	}
	$iconData = \Bitrix\Crm\Service\Timeline\Layout\Common\Icon::initFromCode($icon->getCode())->getData();
	if (!$iconData) // wrong icon code was provided
	{
		return null;
	}
	if (!$iconData['isSystem'])
	{
		$icon->setBackgroundUri($iconData['fileUri']);
	}

	return $icon;
}