Problem regarding SearchableDropdown button

[WebDices]

I have a problem regardin a searchable dropdown widget.

When I try to change the setState() in the app, it doesn't work. So when I click another element, for example: PlatformReach('Jud Braila', '(RO, [Braila] County)'). The state of the widget remains the same.

I looked in the documentation for the dropdown searchable widget, and I don't see any difference regarding setting the state. Here is the link:

https://pub.dev/packages/searchable_dropdown/example

List _platformReach = PlatformReach.getPlatformReach(); List _dropdownPlatformReach;

PlatformReach _selectedPlatformReach;

void initState() { _dropdownMenuItems = buildDropDownMenuItems(_visibility); _selectedVisibility = _dropdownMenuItems[0].value;

_dropdownPlatformReach = buildDropdownMenuItemsPlatformReach(_platformReach); _selectedPlatformReach = _dropdownPlatformReach[0].value;

super.initState(); }

List buildDropdownMenuItemsPlatformReach( List platforms) { List items = List(); for (PlatformReach platform in platforms) { items.add( DropdownMenuItem( value: platform, child: Column( crossAxisAlignment: CrossAxisAlignment.start, children: [ Text( platform.name, style: TextStyle(fontWeight: FontWeight.bold), textAlign: TextAlign.start, ), Text( platform.hint, style: TextStyle( fontWeight: FontWeight.normal, color: Colors.grey), textAlign: TextAlign.end, ) ], ), ), ); } return items; } Expanded(

                          child: SearchableDropdown.single(
                          isExpanded: true,
                          value: _selectedPlatformReach,
                          hint: " ",
                          items: _dropdownPlatformReach,
                          onChanged: (PlatformReach selectedPlatformReach) {
                            setState(() {
                              _selectedPlatformReach = selectedPlatformReach;
                            });
                          },
                        ),
                        flex: 2,
                      ),

class PlatformReach { String name; String hint;

PlatformReach(this.name, this.hint);

static List getPlatformReach() { return [ PlatformReach('Jud Galati', '(RO, [Galati] County)'), PlatformReach('Jud Braila', '(RO, [Braila] County)'), PlatformReach('Jud Prahova', '(RO, [Ploiesti] County)'), PlatformReach('Jud Maramures', '(RO, [Baia Mare] County)'), ]; } }