_buildPDFGrid.dart

  Widget _buildPDFGrid(List<LaudoExameModel> pdf) {
    return ListView.builder(
      shrinkWrap: true,
      // physics: NeverScrollableScrollPhysics(),
      primary: false,
      itemCount: pdf.length,
      itemBuilder: (BuildContext context, int index) {
        final _pdf = pdf[index];
        return Container(
          height: 160,
          child: Card(
            child: PDF(
              enableSwipe: false,
              swipeHorizontal: false,
            ).cachedFromUrl(
              _pdf.arquivo,
              placeholder: (double progress) => Center(child: Text('$progress %')),
              errorWidget: (dynamic error) => Container(),
            ),
          ),
        );
      },
    );
  }