onMarkerRender method
Implementation
void onMarkerRender(
final GemMapController mapController,
final dynamic data,
) => externalRenderers[data['sourceId']]!.processData(mapController, data);
void onMarkerRender(
final GemMapController mapController,
final dynamic data,
) => externalRenderers[data['sourceId']]!.processData(mapController, data);