toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (columnMetadata != null) 'columnMetadata': columnMetadata!,
if (rowData != null) 'rowData': rowData!,
if (rowMetadata != null) 'rowMetadata': rowMetadata!,
if (startColumn != null) 'startColumn': startColumn!,
if (startRow != null) 'startRow': startRow!,
};