code: def get_room_lists
        req = build_soap! do |type, builder|
          if(type == :header)
          else
            builder.room_lists!
          end
        end
        do_soap_request(req, response_class: EwsSoapRoomlistResponse)
      end
docs: Gets the room lists that are available within the Exchange organization.
   @see http://msdn.microsoft.com/en-us/library/aa563465.aspx