Typed list
as.typed_list.RdTyped list ensures all items in the list are of the same type. However, ducktyping takes place, which is if the element has target class it doesn't mean that it has the same structure as other items in the list.
as.typed_list.RdTyped list ensures all items in the list are of the same type. However, ducktyping takes place, which is if the element has target class it doesn't mean that it has the same structure as other items in the list.