message: Mark some properties nullable
diff: @@ -25,9 +25,9 @@ const TelemetryReportingDelay = 2 * 60 * 1000; // two minutes
  export default class TestManager extends AbstractProvider {
  - private _runCounts: { [testFrameworkName: string]: number };
  - private _debugCounts: { [testFrameworkName: string]: number };
  - private _telemetryIntervalId: NodeJS.Timer = undefined;
  + private _runCounts?: { [testFrameworkName: string]: number };
  + private _debugCounts?: { [testFrameworkName: string]: number };
  + private _telemetryIntervalId?: NodeJS.Timer = undefined;
  private _eventStream: EventStream;
  constructor(private optionProvider: OptionProvider, server: OmniSharpServer, eventStream: EventStream, languageMiddlewareFeature: LanguageMiddlewareFeature) {
  