deliver method

Implementation

@override
Future<ChartExportDeliveryResult> deliver(ChartExportFile file) async {
  try {
    await onFile(file);
    return ChartExportDeliveryResult.success(file);
  } catch (error, stackTrace) {
    return ChartExportDeliveryResult.failure(
      file: file,
      error: error,
      stackTrace: stackTrace,
    );
  }
}