CustomPrevIcon fixed
CustomPrevIcon fixed

CustomPrevIcon was not working due to missing lines in notificatiion.dart. It is solved by adding this two lines.

florent37/Flutter-AssetsAudioPlayer,florent37/Flutter-AssetsAudioPlayer,florent37/Flutter-AssetsAudioPlayer,florent37/Flutter-AssetsAudioPlayer,florent37/Flutter-AssetsAudioPlayer,florent37/Flutter-AssetsAudioPlayer