GetPackageNode
virtual PackageNode* GetPackageNode();
virtual PackageNode* GetPackageNode();
virtual PackageNode* GetPackageNode() = 0;
oldPackageNode = unpackingNode->GetPackageNode();
} else if (packageNode == unpackingNode->GetPackageNode()) {
} else if (packageNode == unpackingNode->GetPackageNode()) {
PackageNode* headPackageNode = unpackingNode->GetPackageNode();