public static Operand Clone(Operand op)
{
Operand cloned = new Operand();
foreach (var kv in op.GetEqualRules())
{
cloned.Add(Comparison.EQUALS, kv.Key, kv.Value);
}
foreach (String g in op.groupByList)
{
cloned.groupByList.Add(g);
}
return(cloned);
}
