It always has a line at the bottom, how do I turn it off?

[vqh2602]

custom-dropdown: 3.1.1
flutter: 3.19.6
mycode:

CustomDropdown<String>.search(
                  hintText: 'Select job role',
                  items: _categories,
                  excludeSelected: false,
                  onChanged: (value) {},
                  decoration: CustomDropdownDecoration(
                    closedBorder: Border.all(color: Colors.blueAccent),
                    closedErrorBorder: Border.all(color: Colors.redAccent),
                   
                    // expandedBorder: Border.all(),
                  ),
                ),

[vqh2602]

@AbdullahChauhan

[vqh2602]

Okay, just remove the part after customizing the theme