return nil, err
	}
	serverOnly, err = normalizeSliceOrder(serverOnly, serverOrder, mergeKey, kind)
	if err != nil {
		return nil, err
	}
	all := mergeSortedSlice(serverOnly, patch, serverOrder, mergeKey, kind)

	return all, nil
}

// mergeSortedSlice merges the 2 sorted lists by serverOrder with best effort.
// It will insert each item in `left` list to `right` list. In most cases, the 2 lists will be interleaved.