when I created List<PlutoRow> Data programmatically, not working

[johnzhu123]

handleDataSrc(List<dynamic> dataSrc) {
    final List<PlutoRow> rows = dataSrc.map((dynamic item) {
      Map<String, PlutoCell> cells = {};
      for (var key in item.keys) {
        if (item[key] != null) {
          cells[key] = PlutoCell(value: "${item[key]}");
        }
      }
      PlutoRow row = PlutoRow(cells: cells);
      return row;
    }).toList();
    return rows;
  }
 // this way will not work
 // var rows = handleDataSrc(widget.dataSrc);
 var rows = [
                PlutoRow(
                  cells: {
                    'id': PlutoCell(value: "6580910ddc65492c839bf6e9"),
                    'shipmentID': PlutoCell(value: 'xxx'),
                    'companyCode': PlutoCell(value: 'AAR'),
                    'shipmentETD': PlutoCell(value: 'xxxx'),
                    'shipmentETA': PlutoCell(value: 'xxxx'),
                    'createdAt': PlutoCell(value: '2021-01-01'),
                    'updatedAt': PlutoCell(value: 'xxxx'),
                  },
                )
              ];

I handle the data source in code, and I check the variables in side tabs, it's all ok, but the view will not show the data . don't know what's wrong.
if I write the rows literally, it will work! really need help !!! although I think it may be a tiny issue in code, many thanks!!

work:

not work with the rows shows below

1. The values have been checked for excluding null value

2. checked the pic above for the keys are totally matched