setAlpha abstract method
@brief Method is used to set the opacity of the map object. @param alpha Opacity multiplier. Values below 0 will be set to 0. Values above 1 will be set to 1. Default: 1. @return true if the operation is successful, false otherwise.
Dart code snippet: @snippet location_window_map_objects_example.dart dart_MapObject_setAlpha
Implementation
bool setAlpha(double alpha);