setOutlineAlpha abstract method
@brief Method is used to specify the opacity of the polyline’s outline. @param alpha Opacity multiplier (0 to 1). Values below 0 are set to 0. Default: 1. @return true if the operation is successful, false otherwise.
Dart code snippet: @snippet location_window_map_objects_example.dart dart_PolylineMapObject_setOutlineAlpha
Implementation
bool setOutlineAlpha(double alpha);