l=[foo]
l=[foo, foo2]
l2_size()=0
Bound Integer(2) constructor: 2
BiFunction with literal: unbound, 1, 2
BiFunction with literal: unbound, 3, 4
BiFunction with literal: unbound, 5, 6
BiFunction with function: undefined, 7, 8
BiFunction with function: undefined, 9, 10
BiFunction with function: undefined, 11, 12