message: Singleton instance refactor
diff: @@ -82,11 +82,10 @@ export class Controller {
  ) {
  if (this._instance) {
  this._instance.showReactPanel();
  + } else {
  + this._instance = new Controller(context, extensionStartTime);
  }
  - return (
  - this._instance ||
  - (this._instance = new Controller(context, extensionStartTime))
  - );
  + return this._instance;
  }
  private constructor(
  