Unhandled Exception: MissingPluginException(No implementation found for method saveImage on channel image_save

[54lianxi]

this is my problem,I am using your example on the pub
E/flutter ( 8461): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method saveImage on channel image_save)
E/flutter ( 8461): #0 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:319:7)
E/flutter ( 8461):
E/flutter ( 8461): #1 ImageSave.saveImage (package:image_save/image_save.dart:10:40)
E/flutter ( 8461): #2 _MyAppState._saveImage (package:flutterapp/main.dart:33:23)
E/flutter ( 8461):
E/flutter ( 8461): #3 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:706:14)

[Samoy]

Example updated.