public void Upgrade(AssetMigrationContext context, string dependencyName, PackageVersion currentVersion, PackageVersion targetVersion, YamlMappingNode yamlAssetNode, PackageLoadingAssetFile assetFile)
{
dynamic asset = new DynamicYamlMapping(yamlAssetNode);
// Note: seems little bit strange, but original test was not using targetVersion...
var serializedVersion = AssetRegistry.GetCurrentFormatVersions(typeof(MyUpgradedAsset))[dependencyName];
AssetUpgraderBase.SetSerializableVersion(asset, dependencyName, serializedVersion);
// Move Test1 to Test2
asset.Test2 = asset.Test1;
asset.Test1 = DynamicYamlEmpty.Default;
}