Getting Error: Type 'DecoderCallback' not found. Error when upgrade flutter to 3.16.0

[Munsif-Ali]

After upgrading flutter to 3.16.0. the pdfx package is giving this error after running the project

/C:/Users/Dubai%20Laptops/AppData/Local/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) =>
                                                      ^^^^^^^^^^^^^^^
/C:/Users/Dubai%20Laptops/AppData/Local/Pub/Cache/hosted/pub.dev/pdfx-2.5.0/lib/src/viewer/pdf_page_image_provider.dart:24:55: Error: 'DecoderCallback' isn't a type.
  ImageStreamCompleter load(PdfPageImageProvider key, DecoderCallback decode) =>
                                                      ^^^^^^^^^^^^^^^
/C:/Users/Dubai%20Laptops/AppData/Local/Pub/Cache/hosted/pub.dev/pdfx-2.5.0/lib/src/viewer/pdf_page_image_provider.dart:70:14: Error: 'ImmutableBuffer' isn't a type.
    final ui.ImmutableBuffer buffer =
             ^^^^^^^^^^^^^^^
/C:/Users/Dubai%20Laptops/AppData/Local/Pub/Cache/hosted/pub.dev/pdfx-2.5.0/lib/src/viewer/pdf_page_image_provider.dart:71:18: Error: Undefined name 'ImmutableBuffer'.
        await ui.ImmutableBuffer.fromUint8List(bytes);

To Reproduce
Steps to reproduce the behavior:

1. upgrade flutter to latest version i.e 3.16.0
2. i am using 2.4.0 version of pdfx
3. when running flutter project it is giving me the above error.
4. after updating the pdfx version to 2.5.0 still getting the same error

Smartphone (please complete the following information):

• OS: Ubuntu 22.04

[TomKrauss]

Duplicate of : #448

[ManuelRauber]

Please check the new version on PubDev, it has been updated to 2.6.0 and includes the fix for the DecoderCallback issue.