'Flutter: Instantiate object with multiple parameters

I've encountered a syntactical (i guess?) problem when trying to instantiate an object from my predefined constructor.

Category(String kategorieName, Image cover){
  kategorieTitel = kategorieName;
  kategorieCover = cover;
}

I tried to create a dynamic list which will later be used to auto-fill constructors in a ListView.builder.

  List kategorien = [
{
  'name' : 'Location1',
  'pic' : Asset.Image('assets/img/Locations.jpg')
},
{
  'name' : 'Location2',
   ...
}];

Auto-Filling the name works fine but I wasn't able to call the constructor with the according image-file.

  child: ListView.builder(
    itemCount: kategorien.length,
    itemBuilder: (context, index){
      return Padding(
        padding: EdgeInsets.all(5.0),
        child: Category('${kategorien[index]['name']}'),

I've tried concatenation like Category('${kategorien[index]['name']}', '${kategorien[index][pic]}')

I have no idea how to give the constructor the image by the list. I'd be very thankful for help!

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'Flutter: Instantiate object with multiple parameters

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