private void RowHeadersOnColumnsMoved(IList <int> ints)
{
PivotSpec = PivotSpec.ChangeRowHeaders(ints.Select(i => PivotSpec.RowHeaders[i]));
}
public void AddRowHeader()
{
var newColumns = GetSelectedProperties().Select(pd => new PivotSpec.Column(ColumnId.GetColumnId(pd)));
PivotSpec = PivotSpec.ChangeRowHeaders(PivotSpec.RowHeaders.Concat(newColumns));
}