def begin_merge(reservation_order_id, body, custom_headers:nil)
      response = begin_merge_async(reservation_order_id, body, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def begin_merge(reservation_order_id, body, custom_headers:nil)
      response = begin_merge_async(reservation_order_id, body, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
Merges two `Reservation`s.

 Merge the specified `Reservation`s into a new `Reservation`. The two
 `Reservation`s being merged must have same properties.

 @param reservation_order_id [String] Order Id of the reservation

 @param body [MergeRequest] Information needed for commercial request for a
 reservation
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [Array] operation results.