enum EPCGCollapseVisitOrder
{
UMETA =(Tooltip="Will create pairs based on original point order."),
UMETA =(Tooltip="Will generate a random ordering that will drive pair order creation."),
UMETA =(Tooltip="Will create pairs according to attribute value order (minimum value first)."),
UMETA =(Tooltip = "Will create pairs according to attribute value order (maximum value first)."),
}