src/vs/workbench/contrib/searchEditor/browser/searchEditorInput.ts/SearchEditorInput/backup
class SearchEditorInput:	private async backup(token: CancellationToken): Promise<IWorkingCopyBackup> {
		const contents = await this.serializeForDisk();
		if (token.isCancellationRequested) {
			return {};
		}

		return {
			content: bufferToReadable(VSBuffer.fromString(contents))
		};
	}