How to remove the elevation (shadow) in a SearchDelegate?

Question

I want to remove the shadow from the search bar when using SearchDelegate but I can't find how to. Any tips?

This is basically all the code:

showSearch(
  context: context,
  delegate: CustomSearchDelegate(),
);

CustomSearchDelegate() just contains an empty search delegate widget/class.

Answer 1

@override
  ThemeData appBarTheme(BuildContext context) {
    return super.appBarTheme(context).copyWith(
      appBarTheme: super.appBarTheme(context).appBarTheme.copyWith(
        elevation: 0.0,
      ),
    );
  }