createState method
Create the CellState for this cell.
This method should be overridden by subclasses.
Implementation
@override
CellState createState() {
if (_restoredState != null) {
final state = _restoredState;
_restoredState = null;
return state!;
}
return PrevValueState(
cell: this,
key: key,
arg: cell
);
}