title: Country dimension in Analytics Reporting API v4
body: <p>I want to get a report from Google Analytics v4 for pageviews by country. Since my website is targeting a specific region, I'm filtering by countries I'm most interested in using ga:countryIsoCode dimension so I don't have to type complete country name in the filter.
  Now I'd be also interested in getting pageviews for all other countries combined into 'other' entry. What would be the easiest way to achieve that?
  I've tried dynamic segments so far adding ga:segment to dimensions and a NOT filter in the segment with the same rule I used for filtering counties (except ga:countryIsoCode isn't allowed in segments, so I used ga:country). This produced 3 rows of data with each of three countries appearing along with 'other' every time.
  I'd appreciate an advice on this as it seems like a common use case to me. Thanks in advance!</p>