DataRow.byIndex({int index, bool selected: false, ValueChanged<bool> onSelectChanged, List<DataCell> cells })

Creates the configuration for a row of a DataTable, deriving the key from a row index.

The cells argument must not be null.

Source 

DataRow.byIndex({
  int index,
  this.selected: false,
  this.onSelectChanged,
  this.cells
}) : key = new ValueKey<int>(index);