ISO 3166-1 alpha-2 code of the country the route leaves.
startPointIndex of the country section the route leaves, which identifies that section
on RouteProps.sections even when the route enters the same country twice.
The label its bubble stretches around, such as 'ES → FR'.
ISO 3166-1 alpha-2 code of the country the route enters.
startPointIndex of the country section the route enters.
Display-ready props of one border crossing.