# File lib/ruote/exp/fe_add_branches.rb, line 88
    def apply

      list = split_list(lookup_val_prefix('on') || attribute_text)
      it_fei = find_concurrent_iterator

      if list && it_fei

        wi = Ruote.fulldup(h.applied_workitem)
        wi['fields'][ConcurrentIteratorExpression::ADD_BRANCHES_FIELD] = list

        @context.storage.put_msg('reply', 'fei' => it_fei, 'workitem' => wi)
      end

      reply_to_parent(h.applied_workitem)
    end