public IndexColumn(ExpressionColumn column, IndexColumnOrder order = IndexColumnOrder.Ascending)
{
if (column == null)
{
throw new ArgumentNullException(nameof(column));
}
if (!order.IsValid())
{
throw new ArgumentException($"The { nameof(IndexColumnOrder) } provided must be a valid enum.", nameof(order));
}
Expression = column.Expression;
Order = order;
}