appbar error

[naiiu]

Compiler message:
lib/main.dart:25:15: Error: The argument type '#lib1::CustomAppBar' can't be assigned to the parameter type '#lib2::PreferredSizeWidget'.
Try changing the type of the parameter, or casting the argument to '#lib2::PreferredSizeWidget'.
appBar: CustomAppBar(),
^
Compiler failed on C:\Users\shaoz\Downloads\flightapp-master\lib\main.dart
Gradle task assembleDebug failed with exit code 1

[pburel]

Could be:
//appBar: CustomAppBar(),
bottomNavigationBar: PreferredSize(
preferredSize: Size.fromHeight(50.0), // here the desired height
child: CustomAppBar(
// ...
),
),

[TechieBlossom]

@pburel is right, but with a slight correction.
bottomNavigationBar: CustomAppBar().

in next code push, I will definitely update it.