public PlaceDetailsRequest region(String region) {
    return param("region", region);
  }
Sets the Region for this request. The region code, specified as a ccTLD (country code top-level
domain) two-character value. Most ccTLD codes are identical to ISO 3166-1 codes, with some
exceptions. This parameter will only influence, not fully restrict, results.

@param region The region code.
@return Returns this {@code PlaceDetailsRequest} for call chaining.
src/main/java/com/google/maps/PlaceDetailsRequest.java