code { UPDATE } ;
input { Stack_elt string "2" ; Stack_elt (option string) None ; Stack_elt (big_map string string) 10 } ;
output { Stack_elt (big_map string string) (Pair 10 { Elt "2" None }) } ;
big_maps { Big_map 10 string string { Elt "1" "one" ; Elt "2" "two" } }