The argument type 'Future<Widget>' can't be assigned to the parameter type 'Widget'.dart
Your method must return Future<Widget>, as I'm understanding your question's title is your error, its mean that you returning a Widget not Future<Widget>. To do that, you should wrap your widget inside the Future like this:
Future<Widget> getWidgetAsync(double size) async {PdfImage val = await pdfImageFromImageProvider( pdf: pdf.document, image: fw.AssetImage('assets/' + iconPath),);return Future.value(Container( width: size, height: size, decoration: BoxDecoration( color: layoutbg, shape: BoxShape.circle, ), child: Image(val),));Hope this will work.