src/vs/platform/extensionManagement/common/extensionStorage.ts/ExtensionStorageService/addToMigrationList
class ExtensionStorageService:	addToMigrationList(from: string, to: string): void {
		if (from !== to) {
			// remove the duplicates
			const migrationList: [string, string][] = this.migrationList.filter(entry => !entry.includes(from) && !entry.includes(to));
			migrationList.push([from, to]);
			this.migrationList = migrationList;
		}
	}