The argument type 'Stream<SequenceState?>' can't be assigned to the parameter type 'Stream<SequenceState>?

[Helyanti]

The following code stream: audioPlayer.sequenceStateStream, in PlayerButtons doesn't work.
I am getting this error: The argument type 'Stream<SequenceState?>' can't be assigned to the parameter type 'Stream<SequenceState>?'

StreamBuilder<SequenceState>( stream: audioPlayer.sequenceStateStream, builder: (_, __) { return _previousButton(); }, ),
StreamBuilder<SequenceState>( stream: audioPlayer.sequenceStateStream, builder: (_, __) { return _nextButton(); }, ),

[mvolpato]

Hi @Helyanti,

The code is a year old, the package has had some changes.

To get it working you could fix the packages' versions, but I would not recommend that.

You can fix the code by changing the type of the stream builder to StreamBuilder<SequenceState?>, handling the null case in the bodies of the builder functions.