toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (insertSheetIndex != null) 'insertSheetIndex': insertSheetIndex!,
if (newSheetId != null) 'newSheetId': newSheetId!,
if (newSheetName != null) 'newSheetName': newSheetName!,
if (sourceSheetId != null) 'sourceSheetId': sourceSheetId!,
};