# keyByPolylineId function

Map <String, Polyline> keyByPolylineId (

1. Iterable <Polyline> polylines

)

## Implementation

    Map<String, Polyline> keyByPolylineId(Iterable<Polyline> polylines) {
      if (polylines == null) {
        return <String, Polyline>{};
      }
      return Map<String, Polyline>.fromEntries(polylines.map((Polyline polyline) =>
          MapEntry<String, Polyline>(polyline.id, polyline.clone())));
    }