How to use [From...] in Guided Decision Table to read a collection in fact object in Business Central

Issue

• When creating a "Guided Decision Table", how can we define the column to iterate over a list (from in DRL) within a fact model ?
• Following is an example rule that we have :

rule "example discount rule"
// There is Order, within Order there is a list of Item
// Iterate over the Item list within the Order, and apply 10% discount for those item's value greater than $100.0
when
    $order : Order()
    $item  :  Item( itemValue > 100 ) from $order.listItems
then
    # apply 10% discount to $item.itemValue
end

• In Guided Decision Table how can I create a condition column which is equivalent to this line in DRL language:

$var1 : Type() from $var2.list 

// var2.list is a List / Collection variable containing multiple instances of `Type`