setIconWithCallback abstract method
Sets an icon with the default style for the placemark. Switches off and resets model/composite icon/animation/view. The callback is called immediately after the image finished loading. This means you can, for example, change the placemark visibility with a new icon.
onFinished
Called when the icon is loaded.
Implementation
void setIconWithCallback(image_provider.ImageProvider image,
mapkit_map_callback.Callback onFinished);