src/vs/workbench/contrib/debug/browser/debugViewlet.ts/DebugViewPaneContainer/onDebugServiceStateChange
class DebugViewPaneContainer:	private onDebugServiceStateChange(state: State): void {
		if (this.progressResolve) {
			this.progressResolve();
			this.progressResolve = undefined;
		}

		if (state === State.Initializing) {
			this.progressService.withProgress({ location: VIEWLET_ID, }, _progress => {
				return new Promise<void>(resolve => this.progressResolve = resolve);
			});
		}
	}