Flutter 将本地存储的图像传递到social_share插件的路径

当用户共享内容时，我想将我的pubspec.yaml资产文件中本地存储的图像传递给社交共享插件。我可以从截图和图库中分享，但我不知道如何分享本地图像

  RaisedButton(
                  onPressed: () async {
                    SocialShare.shareInstagramStory(
                      'assets/images/iPhone_11_Pro_fast_food.png',
                      backgroundTopColor: "#ffffff",
                      backgroundBottomColor: "#000000",
                      attributionURL: "https://deep-link-url",
                      backgroundImagePath:
                          'assets/images/iPhone_11_Pro_fast_food.png',
                    ).then((data) {
                      print(data);
                    });
                  },
                  child: Text("Share On Instagram Story"),
                ),

正如您所看到的，我已经输入了路径，这导致了一个错误

image path FileImage("assets/images/iPhone_11_Pro_fast_food.png", scale: 1.0)
 *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[0]'