Unexpected namespace naming with nested messages about protobuf-php HOT 2 OPEN

        foreach($req->getProtoFileList() as $proto) {
            $package = $proto->getPackage();
            $namespace = $generator->getNamespace($proto);
            if (isset($this->packages[$package]) && $namespace !== $this->packages[$package]) {
                $this->warning("Package $package was already mapped to {$this->packages[$package]} but has now been overridden to $namespace");
            }
            $this->packages[$package] = $namespace;
            $this->notice("Mapping $package to $namespace");

            PackageMap::map($this, $namespace); // hack
        }

use DrSlump\Protobuf\Compiler;

class PackageMap
{
    private static $packageList = array(
        'BidRequest',
        'BidRequest.AdSlot',
        'BidRequest.AdSlot.MatchingAdData',
        'BidRequest.AdSlot.MatchingAdData.DirectDeal',
        'BidRequest.AdSlot.SlotVisibility',
        'BidRequest.KeyValue',
        'BidRequest.MatchingNetwork',
        'BidRequest.Mobile',
        'BidRequest.Mobile.DeviceOsVersion',
        'BidRequest.Mobile.MobileDeviceType',
        'BidRequest.Mobile.ScreenOrientation',
        'BidRequest.UserList',
        'BidRequest.Vertical',
        'BidRequest.Video',
        'BidRequest.Video.CompanionSlot',
        'BidRequest.Video.CompanionSlot.CreativeFormat',
        'BidRequest.Video.InventoryType',
        'BidRequest.Video.SkippableBidRequestType',
        'BidRequest.Video.VideoFormat',
        'BidResponse',
        'BidResponse.Ad',
        'BidResponse.Ad.AdSlot',
        'BidResponse.Ad.TemplateParameter'
    );

    public static function map(Compiler $compiler, $namespace)
    {
        foreach (self::$packageList as $package) {
            $compiler->setPackage($package, self::normalize($namespace.'.'.$package));
        }
    }

    private static function normalize($ns)
    {
        return strtr($ns, '.', '\\');
    }
}