https://pub.dev/documentation/flutter_map/latest/flutter_map/PolygonLayer/PolygonLayer.html
PolygonLayer.new constructor - PolygonLayer - flutter_map library - Dart API
API docs for the PolygonLayer.new constructor from Class PolygonLayer from the flutter_map library, for the Dart programming language.
map librarynewconstructorflutterdart