Error while runing

**This error appeared after i upgrade flutter to latest version**
```
Running Gradle task 'assembleDebug'...
../../.pub-cache/hosted/pub.dev/pdfx-2.5.0/lib/src/viewer/pdf_page_image_provider.dart:24:55: Error: Type 'DecoderCallback' not found.
  ImageStreamCompleter load(PdfPageImageProvider key, DecoderCallback decode) =>
```