# File lib/chef/run_list.rb, line 59
    def <<(run_list_item)
      run_list_item = run_list_item.kind_of?(RunListItem) ? run_list_item : parse_entry(run_list_item)
      @run_list_items << run_list_item unless @run_list_items.include?(run_list_item)
      self
    end