toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (courseId != null) 'courseId': courseId!,
if (courseWorkId != null) 'courseWorkId': courseWorkId!,
if (creationTime != null) 'creationTime': creationTime!,
if (criteria != null) 'criteria': criteria!,
if (id != null) 'id': id!,
if (sourceSpreadsheetId != null)
'sourceSpreadsheetId': sourceSpreadsheetId!,
if (updateTime != null) 'updateTime': updateTime!,
};