Inserts all of the elements in the RoleUnresolvedList specified into
this list, starting at the specified position, in the order in which
they are returned by the Iterator of the RoleUnresolvedList specified.
Appends all the elements in the RoleUnresolvedList specified to the end
of the list, in the order in which they are returned by the Iterator of
the RoleUnresolvedList specified.