How to sum time in Footer?

[KurtLa]

At the moment I am not able to sum the time in the footer, so I can't create time based calculations :(
Am I missing something here?

[KurtLa]

Oh...
I have figured it out. It only requires a widget as footerRenderer:

PlutoColumn(
        title: 'Title',
        field: 'title',
        type: PlutoColumnType.time(),
        footerRenderer: (context) => Container(
            color: Colors.white, child: Center(child: Text((MediaQuery.of(outerContext).size.width).toString()))),
      ),

Thx for that great package!