load method
Loads the audio for the underlying audio source.
Implementation
@override
Future<Duration?> load([int? initialPosition]) async {
_initialPos = initialPosition;
_resumePos = (initialPosition ?? 0) / 1000.0;
_duration = await html5AudioPlayer.loadUri(
uri,
initialPosition != null
? Duration(milliseconds: initialPosition)
: null);
_initialPos = null;
return _duration;
}