src/vs/workbench/common/configuration.ts/ConfigurationMigrationWorkbenchContribution/migrateConfigurationsForFolder
class ConfigurationMigrationWorkbenchContribution:	private async migrateConfigurationsForFolder(folder: IWorkspaceFolder | undefined, migrations: ConfigurationMigration[]): Promise<void> {
		await Promise.all(migrations.map(migration => this.migrateConfigurationsForFolderAndOverride(migration, { resource: folder?.uri })));
	}