_searchResults = items
            .where((faculty) => faculty.title.toLowerCase().indexOf(query) > -1)
            .toList();

class FabricanteOleo {
  String nome;
  int id;

  FabricanteOleo({this.nome, this.id});

  FabricanteOleo.fromJson(json) {
    nome = json['nome'];
    id = json['id'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['nome'] = this.nome;
    data['id'] = this.id;
    return data;
  }
}

 _dropSearch() {
    return new SearchableDropdown<FabricanteOleo>(
      isCaseSensitiveSearch: true,
      items: listaFabricantes.map((fab){
        return DropdownMenuItem<FabricanteOleo>(
          child: new Text(fab.nome),
          value: fab,
        );
      }).toList(),
      value: fabricanteOleoSelecionado,
      hint: new Text('Select One'),
      searchHint: new Text(
        'Select One',
        style: new TextStyle(fontSize: 20),
      ),
      onChanged: (FabricanteOleo value) {
        setState(() {
          this.fabricanteOleoSelecionado = value;
        });
      },
    );

SearchableDropdown.single(
                  isCaseSensitiveSearch: true,
                  items: data.map((item) {
                    return new DropdownMenuItem(
                    child : Directionality(
                    textDirection: TextDirection.rtl,
                    child: new Text(item['countryNameAr'].toString(), textAlign: TextAlign.right, textDirection: TextDirection.rtl), ),
                    value: item['countryCode'].toString(),
                    );
                    }).toList(),
                   value: _mySelection,
                  hint: "Select one",
                  searchHint: "Select one",
                  onChanged: (value) {
                    setState(() {
                      _mySelection = value;
                    });
                  },
                  isExpanded: true,
                  searchFn: (String keyword,  List<DropdownMenuItem> items) {
                    List<int> ret = List<int>();
                    if (keyword != null && items != null) {
                      keyword.split(" ").forEach((k) {
                        int i = 0;
                        items.forEach((item) {
                          if (keyword.isEmpty || (k.isNotEmpty &&
                              (item.value.countryNameAr.toString().toLowerCase().contains(k.toLowerCase()) ||
                                  item.value.countryCode.toString().contains(k)))) {
                            ret.add(i);
                          }
                          i++;
                        });
                      });
                    }
                    if(keyword.isEmpty){
                      ret = Iterable<int>.generate(items.length).toList();
                    }
                    return (ret);
                  },

                ),

            Padding(
              padding: const EdgeInsets.only(top: 14),
              child: new TextField(

                // maxLengthEnforced: true,
                keyboardType: TextInputType.multiline,
                controller: controller1,
                decoration: new InputDecoration(
                  // contentPadding: EdgeInsets.symmetric(vertical: 26,horizontal: 10),
                    border: OutlineInputBorder(),
                    hintText: "Add Task name Only",
                    labelText: "Add Task name only"
                ),
              ),
            ),
            new SizedBox(
                height:6
            ),

            Column(
              children: <Widget>[

                Row(
                  mainAxisAlignment: MainAxisAlignment.start,
                  children: <Widget>[
                    new Text("Select Product:", style: new TextStyle(fontSize: 12),),
                  ],
                ),

                Container(

                  height: 50,
                  width: MediaQuery.of(context).size.width,
                  decoration: ShapeDecoration(

                    shape: RoundedRectangleBorder(

                      side: BorderSide(width: 1.0, style: BorderStyle.solid, color: Colors.blue),
                      borderRadius: BorderRadius.all(Radius.circular(5.0)),
                    ),
                  ),
                  child: Padding(
                    padding: const EdgeInsets.symmetric(horizontal:10.0),
                    child: StatefulBuilder(
                      //stream: null,
                        builder: (BuildContext context, StateSetter setState) {
                          /*  return  DropdownButton<String>(
                            //  hint: Text('Project'),
                              value:applicationDropDown,
                              isExpanded: true,

                              // style: Theme.of(context).textTheme.title,
                              //  icon: Icon(Icons.arrow_drop_down,color: Colors.lightBlue,),

                              onChanged: (String newValue) {
                                setState(() {
                                  applicationDropDown = newValue;
                                });


                              },
                              items: applicationList.cast<String>()

                                  .map<DropdownMenuItem<String>>((String value) {
                                return DropdownMenuItem<String>(
                                  value: value,
                                  child: Text(value),

                                );
                              })
                                  .toList()
                          );        */

                          return SearchableDropdown.single(
                            items: applicationList.cast<String>()

                                .map<DropdownMenuItem<String>>((String value) {
                              return DropdownMenuItem<String>(
                                value: value,
                                child: Text(value, ),

                              );
                            })
                                .toList(),
                            value: applicationDropDown,
                            hint: "Select one",
                            searchHint: "Select one",
                            onChanged: (value) {
                              setState(() {
                                applicationDropDown = value;
                              });
                            },
                            isExpanded: true,
                            // label: "Select Project",

                            selectedValueWidgetFn: (item) {
                              return Container(
                                  transform: Matrix4.translationValues(-10,0,0),
                                  alignment: Alignment.centerLeft,
                                  child: (Text(item.toString())));
                            },

                            // style: Theme.of(context).textTheme.title,
                            displayClearIcon: false,

                          );
                        }
                    ),
                  ),
                ),
              ],
            ),


            Padding(
              padding: const EdgeInsets.only(top:7.0),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.start,
                children: <Widget>[
                  Column(
                    //  mainAxisAlignment: MainAxisAlignment.start,
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: <Widget>[
                      new Text("Select Customer:", style: new TextStyle(fontSize: 12),),

                      Container(

                        height: 50,
                        width: MediaQuery.of(context).size.width/2,
                        decoration: ShapeDecoration(

                          shape: RoundedRectangleBorder(

                            side: BorderSide(width: 1.0, style: BorderStyle.solid, color: Colors.blue),
                            borderRadius: BorderRadius.all(Radius.circular(5.0)),
                          ),
                        ),
                        child: Padding(
                          padding: const EdgeInsets.symmetric(horizontal:10.0),
                          child: StatefulBuilder(
                            //stream: null,
                              builder: (BuildContext context, StateSetter setState) {
                                return SearchableDropdown.single(
                                  items: projectList.cast<String>()

                                      .map<DropdownMenuItem<String>>((String value) {
                                    return DropdownMenuItem<String>(
                                      value: value,
                                      child: Text(value, ),

                                    );
                                  })
                                      .toList(),
                                  value: projectDropDown,
                                  hint: "Select one",
                                  searchHint: "Select one",
                                  onChanged: (value) {
                                    setState(() {
                                      projectDropDown = value;
                                    });
                                  },
                                  isExpanded: true,
                                  // label: "Select Project",

                                  selectedValueWidgetFn: (item) {
                                    return Container(
                                        transform: Matrix4.translationValues(-10,0,0),
                                        alignment: Alignment.centerLeft,
                                        child: (Text(item.toString())));
                                  },


                                  // style: Theme.of(context).textTheme.title,
                                  displayClearIcon: false,

                                );
                              }
                          ),
                        ),
                      ),
                    ],

        SearchableDropdown(
              dataList: operators,
              queryBuilder: (String keyword, List<OperatorModel> list) {
                List<int> shownIndexes = [];
                int i = 0;
                list.forEach((item) {
                  if(keyword.isEmpty || item.opeCode.toLowerCase().contains(keyword.trim().toLowerCase())
                      || item.opeName.toLowerCase().contains(keyword.trim().toLowerCase())
                      || item.opeNameEn.toLowerCase().contains(keyword.trim().toLowerCase())){
                    shownIndexes.add(i);
                  }
                  i++;
                });
                return shownIndexes;
              },
              items: operators.map((operator) {
                return DropdownMenuItem<int>(
                  child: Text(operator.opeCode + "-" + operator.opeName),
                  value: operator.opeId
                ); 
              }).toList(),
              value: selectedOperatorId,
              hint: new Text('Select One'),
              searchHint: new Text('Select One', style: new TextStyle(fontSize: 20)),
              onChanged: (value) {
                setState(() {
                  selectedOperatorId = value;
                });
              },
              isExpanded: true,
            )

SearchableDropdown.single(
            hint: 'Selecione seu paciente',
            dialogBox: false,
            isExpanded: true,
            menuConstraints: BoxConstraints.tight(Size.fromHeight(350)),
            items: optionsList,
            onChanged: (value) {
              BlocProvider.of<NewSchedulingBloc>(context).add(SchedulingFormChanged(value));
            },
            searchHint: 'Digite o nome do seu paciente',
            closeButton: (selectedItemsClose){
              return Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: <Widget>[
                  FlatButton(
                    onPressed: () => newPatientCallback(),
                    child: Text('Novo Paciente'),
                  ),
                  FlatButton(
                    onPressed: () => pop(), // =>Does not pop or close the dropdown menu at all...
                    child: Text('Novo Paciente'),
                  ),
                ],
              );
            },
           doneButton: 'Fechar'
          )

import 'package:flutter/material.dart';
// import 'package:foodfromforeign1/models/country.dart';
import 'dart:async';
import 'package:http/http.dart' as http;
import 'dart:convert';
import 'package:searchable_dropdown/searchable_dropdown.dart';

void main() => runApp( MyApp());

class Country{
  String name;
  int id;
  Country(this.name,this.id);
  toString(){
    return(name);
  }
}
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return  MaterialApp(
      title: 'Flutter Demo',
      theme:  ThemeData(
        primarySwatch: Colors.red,
      ),
      home:  MyHomePage(title: 'Users'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() =>  _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

static final String countriesJson = '[{"id":0,"name":"Afghanistan"},{"id":1,"name":"Albania"},{"id":2,"name":"Algeria"},{"id":3,"name":"Angola"}]';
List<Country> countries;
List<DropdownMenuItem<Country>> countriesDropdownItems;
Country selectedCountry;


    @override
  void initState() {
    super.initState();
   countries=(jsonDecode(countriesJson) as List<dynamic>).map<Country>((e) => Country(e['name'],e['id'])).toList();
    countriesDropdownItems = countries.map<DropdownMenuItem<Country>>((e) => DropdownMenuItem(child:Text(e.name),value:e,)).toList();
    super.initState();
  }

@override
  Widget build(BuildContext context) {
    return  Scaffold(
      appBar:  AppBar(
        title:  Text(widget.title),
      ),
      body:Container(
          padding: EdgeInsets.symmetric(horizontal: 20, vertical: 30),
        child:Column(
         children: <Widget>[
            SearchableDropdown.single(
        items: countriesDropdownItems,
        value: selectedCountry,
        hint: "Select one country",
        searchHint: "Select one country",
        onChanged: (value) {
          setState(() {
            selectedCountry = value;
          });
        },
        isExpanded: true,
      )
         ],

        ),  
      


        
      ),
    );
  
  }
}

  Future<String> getSWData() async {
    var res = await http .get(Uri.encodeFull(url), headers: {"Accept": "application/json"});
    var resBody = json.decode(res.body);

    setState(() {
      data = resBody;
    });

    return "Sucess";
  }
`
```
and here is my dropdown 

 ```
 children: <Widget>[
             SearchableDropdown.single(
             hint:Text("Select Country"),
              isExpanded: true,
          items: data.map((item) {
            return  DropdownMenuItem(
             
              child:  Text(item['name']),
              value: item['id'].toString(),
            );
      
          }).toList(),
          onChanged: (newVal) {
            setState(() {
              _countryname = newVal;
              city.clear();
              _myState=null;
              this.getCity(int.parse(_countryname));
            });
          },
          value:_countryname,
        ),
         ],
```

it's load data from api but when i search i m not getting search data is there is any extra step for search? the package should be dynamic like jquery select2

  List<String> _items = ['aaaaaaa', 'bbbbbbb', 'ccccccc', 'dddddd'];
  String _selectedItem;
.
.
.
  SearchableDropdown.single(
    items: _items.map((location) {
      return DropdownMenuItem(
        child: new Text(location),
        value: location,
      );
    }).toList(),
    value: _selectedItem,
    hint: Text('Please select an Item'),
    searchHint: "Select one",
    onChanged: (value) {
      setState(() {
        _selectedItem = value;
      });
    },
    isExpanded: true,
  ),
.
.
.

Launching lib/main.dart on iPhone 11 in debug mode...
Running Xcode build...
Xcode build done.                                           15.9s
Failed to build iOS app
Error output from Xcode build:
↳
    ** BUILD FAILED **


Xcode's output:
↳
    === BUILD TARGET Runner OF PROJECT Runner WITH CONFIGURATION Debug ===
    ld: warning: Could not find or use auto-linked library 'swiftCoreFoundation'
    ld: warning: Could not find or use auto-linked library 'swiftCompatibility50'
    ld: warning: Could not find or use auto-linked library 'swiftObjectiveC'
    ld: warning: Could not find or use auto-linked library 'swiftCore'
    ld: warning: Could not find or use auto-linked library 'swiftQuartzCore'
    ld: warning: Could not find or use auto-linked library 'swiftCoreGraphics'
    ld: warning: Could not find or use auto-linked library 'swiftDarwin'
    ld: warning: Could not find or use auto-linked library 'swiftUIKit'
    ld: warning: Could not find or use auto-linked library 'swiftFoundation'
    ld: warning: Could not find or use auto-linked library 'swiftCoreImage'
    ld: warning: Could not find or use auto-linked library 'swiftCompatibilityDynamicReplacements'
    ld: warning: Could not find or use auto-linked library 'swiftMetal'
    ld: warning: Could not find or use auto-linked library 'swiftDispatch'
    ld: warning: Could not find or use auto-linked library 'swiftCoreMedia'
    ld: warning: Could not find or use auto-linked library 'swiftCoreAudio'
    ld: warning: Could not find or use auto-linked library 'swiftSwiftOnoneSupport'
    Undefined symbols for architecture x86_64:
      "value witness table for Builtin.UnknownObject", referenced from:
          full type metadata for searchable_dropdown.SwiftSearchableDropdownPlugin in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "__swift_FORCE_LOAD_$_swiftCompatibilityDynamicReplacements", referenced from:
          __swift_FORCE_LOAD_$_swiftCompatibilityDynamicReplacements_$_searchable_dropdown in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
         (maybe you meant: __swift_FORCE_LOAD_$_swiftCompatibilityDynamicReplacements_$_searchable_dropdown)
      "_swift_allocObject", referenced from:
          @objc searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "static (extension in Foundation):Swift.String._unconditionallyBridgeFromObjectiveC(__C.NSString?) -> Swift.String", referenced from:
          searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "static Swift.String.+ infix(Swift.String, Swift.String) -> Swift.String", referenced from:
          searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "_swift_unknownObjectRelease", referenced from:
          static searchable_dropdown.SwiftSearchableDropdownPlugin.register(with: __C.FlutterPluginRegistrar) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          @nonobjc __C.FlutterMethodChannel.__allocating_init(name: Swift.String, binaryMessenger: __C.FlutterBinaryMessenger) -> __C.FlutterMethodChannel in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          @objc static searchable_dropdown.SwiftSearchableDropdownPlugin.register(with: __C.FlutterPluginRegistrar) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          reabstraction thunk helper from @escaping @callee_unowned @convention(block) (@unowned Swift.AnyObject?) -> () to @escaping @callee_guaranteed (@in_guaranteed Any?) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "_swift_release", referenced from:
          searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          ___swift_destroy_boxed_opaque_existential_0 in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          @objc searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "_swift_deallocObject", referenced from:
          l_objectdestroy in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "_swift_retain", referenced from:
          searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "_swift_unknownObjectRetain", referenced from:
          @objc static searchable_dropdown.SwiftSearchableDropdownPlugin.register(with: __C.FlutterPluginRegistrar) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "Swift._bridgeAnythingToObjectiveC<A>(A) -> Swift.AnyObject", referenced from:
          reabstraction thunk helper from @escaping @callee_unowned @convention(block) (@unowned Swift.AnyObject?) -> () to @escaping @callee_guaranteed (@in_guaranteed Any?) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "(extension in Foundation):Swift.String._bridgeToObjectiveC() -> __C.NSString", referenced from:
          @nonobjc __C.FlutterMethodChannel.__allocating_init(name: Swift.String, binaryMessenger: __C.FlutterBinaryMessenger) -> __C.FlutterMethodChannel in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "_swift_getObjCClassFromMetadata", referenced from:
          @nonobjc __C.FlutterMethodChannel.__allocating_init(name: Swift.String, binaryMessenger: __C.FlutterBinaryMessenger) -> __C.FlutterMethodChannel in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "type metadata for Swift.String", referenced from:
          searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "__swift_FORCE_LOAD_$_swiftCompatibility50", referenced from:
          __swift_FORCE_LOAD_$_swiftCompatibility50_$_searchable_dropdown in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
         (maybe you meant: __swift_FORCE_LOAD_$_swiftCompatibility50_$_searchable_dropdown)
      "_swift_getObjCClassMetadata", referenced from:
          type metadata accessor for __C.FlutterMethodChannel in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          @objc static searchable_dropdown.SwiftSearchableDropdownPlugin.register(with: __C.FlutterPluginRegistrar) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "_swift_bridgeObjectRelease", referenced from:
          @nonobjc __C.FlutterMethodChannel.__allocating_init(name: Swift.String, binaryMessenger: __C.FlutterBinaryMessenger) -> __C.FlutterMethodChannel in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "_swift_getObjectType", referenced from:
          static searchable_dropdown.SwiftSearchableDropdownPlugin.register(with: __C.FlutterPluginRegistrar) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "_swift_getInitializedObjCClass", referenced from:
          type metadata accessor for __C.FlutterMethodChannel in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          type metadata accessor for searchable_dropdown.SwiftSearchableDropdownPlugin in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
      "Swift.String.init(_builtinStringLiteral: Builtin.RawPointer, utf8CodeUnitCount: Builtin.Word, isASCII: Builtin.Int1) -> Swift.String", referenced from:
          static searchable_dropdown.SwiftSearchableDropdownPlugin.register(with: __C.FlutterPluginRegistrar) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
          searchable_dropdown.SwiftSearchableDropdownPlugin.handle(_: __C.FlutterMethodCall, result: (Any?) -> ()) -> () in libsearchable_dropdown.a(SwiftSearchableDropdownPlugin.o)
    ld: symbol(s) not found for architecture x86_64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)

Could not build the application for the simulator.
Error launching application on iPhone 11.

                                      .map<DropdownMenuItem<String>>((String value) {
                                    return DropdownMenuItem<String>(
                                      value: value,
                                      child: Text(value),

                                    );
                                  })
                                      .toList(),
                                  value: dropDownValue,
                                  hint: "Select one",
                                  searchHint: "Select one",
                                  onChanged: (value) {
                                    setState(() {
                                      dropDownValue = value;
                                    });
                                  },
                                  isExpanded: true,
                                  // label: "Select Project",
                                  selectedValueWidgetFn: (item) {
                                    return Container(
                                        transform: Matrix4.translationValues(-10,0,0),
                                        alignment: Alignment.centerLeft,
                                        child: (Text(item.toString())));
                                  },


                                  // style: Theme.of(context).textTheme.title,
                               //   displayClearIcon: false,

                                );

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.12.13+hotfix.9, on Microsoft Windows [Version 10.0.18362.720], locale en-US)
[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[√] Android Studio (version 3.6)
[√] VS Code, 64-bit edition (version 1.43.1)
[√] Connected device (1 available)

• No issues found!

FutureBuilder<List<dynamic>>(
  future: _fetchCountries,
  builder: (context, snapshot) {
    if (snapshot.hasData) {
      List<String> countrylist = [];
      List<DropdownMenuItem<String>> countries;
      for (var i = 0; i < snapshot.data.length; i++) {
        countrylist.add(snapshot.data[i]['name']);
      }
      countries = countrylist.map((String value) {
        return new DropdownMenuItem<String>(
          value: value,
          child: Text(
            value,
            style: TextStyle(fontSize: 16),
          ),
        );
      }).toList();
      return SearchableDropdown.single(
          //menuConstraints: BoxConstraints.tight(Size.fromHeight(350)),
          dialogBox: true,
          menuBackgroundColor: Colors.white,
          icon: Icon(
            Icons.arrow_drop_down,
            size: 25,
            color: Colors.white,
          ),
          items: countries,
          style: TextStyle(color: Colors.white),
          hint: Padding(
            padding: const EdgeInsets.only(left: 0, right: 0, top: 0, bottom: 15),
            child: Text(
              "Country",
              style: TextStyle(color: Colors.white, fontSize: 16),
            ),
          ),
          value: _country,
          searchHint: "Select a country",
          onChanged: (value) {
            setState(() {
              _country = value;
            });
          },
          isExpanded: true,
          validator: (value) {
            if (value == null) {
              return 'Select a country';
            }
            return null;
          });
    } else if (snapshot.hasError) {
      return Text("${snapshot.error}");
    }
    return CircularProgressIndicator();
  },
),

                    child: SearchableDropdown.single(
                        value: "USD",
                        items: ["USD", "EUR", "CHF", "HUF"]

[✓] Flutter (Channel stable, v1.12.13+hotfix.9, on Mac OS X 10.15.3 19D76, locale en-KH)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[✓] Xcode - develop for iOS and macOS (Xcode 11.4)
[✓] Android Studio (version 3.4)
[✓] VS Code (version 1.44.2)
[✓] Connected device (2 available)

• No issues found!