load method
Implementation
@override
ImageStreamCompleter load(
image_provider.OptimizedCacheImageProvider key, DecoderCallback decode) {
final chunkEvents = StreamController<ImageChunkEvent>();
return MultiImageStreamCompleter(
chunkEvents: chunkEvents.stream,
codec:
_loadAsync(key as OptimizedCacheImageProvider, chunkEvents, decode),
scale: key.scale,
informationCollector: _imageStreamInformationCollector(key));
}