init static method
      
dynamic
init({})
      
     
    
It need be called before you use this lib passing the theme and the Google Maps API KEY
Implementation
static init(
    {Widget Function(Function(String address) search)? searchBuilder,
    Widget Function(String address, Function done)? addressBuilder,
    Widget? progressWidget,
    Widget? marker,
    required MPickerTheme theme,
    required String key}) {
  MapPicker._addressBuilder = addressBuilder;
  MapPicker._progressWidget = progressWidget;
  MapPicker._searchBuilder = searchBuilder;
  MapPicker._markerWidget = marker;
  MapPicker._gTheme = theme;
  MapPicker._key = key;
}