extensions/typescript-language-features/src/tsServer/cachedResponse.ts/CachedResponse/reset
class CachedResponse:	private async reset(
		document: vscode.TextDocument,
		resolve: Resolve<T>
	): Promise<ServerResponse.Response<T>> {
		this.version = document.version;
		this.document = document.uri.toString();
		return this.response = resolve();
	}