isEditable method
Implementation
bool isEditable(PlutoColumn col, PlutoRow row)
{
var rowIdx = rows.indexOf(row);
var colIdx = map.containsKey(col) ? map[col]!.index : -1;
var hdr = map.containsKey(col) ? map[col] : null;
var cell = widget.model.getRowCellModel(rowIdx, colIdx);
var editable = cell?.editable ?? hdr?.editable ?? false;
return editable;
}