src/vs/workbench/api/browser/mainThreadProgress.ts/MainThreadProgress/constructor
class MainThreadProgress:	constructor(
		extHostContext: IExtHostContext,
		@IProgressService progressService: IProgressService,
		@ICommandService private readonly _commandService: ICommandService
	) {
		this._proxy = extHostContext.getProxy(ExtHostContext.ExtHostProgress);
		this._progressService = progressService;
	}