src/vs/workbench/contrib/extensions/browser/extensionsViews.ts/ExtensionsListView/dispose
class ExtensionsListView:	override dispose(): void {
		super.dispose();
		if (this.queryRequest) {
			this.queryRequest.request.cancel();
			this.queryRequest = null;
		}
		if (this.queryResult) {
			this.queryResult.disposables.dispose();
			this.queryResult = undefined;
		}
		this.list = null;
	}