Example of containment
//Do all values of list1 exist in list2
=: if(condition: $list1 == $cross; then: true; else: false)
cross: listcross(list: $list1; list: $list2)
~list1: json`[1,2,4]`
list2: json`[1,3,2,5,4]`
We perform a complete comparison of list1 with the remainder of the intersection with list2.