save before experiment, broken

lib/common/apifunctions/categories.dart

@@ -13,7 +13,7 @@ class Category {
   });
 }
 
-Future<List<Category>> getCategories() async {
+Future<List<Category>> getCategories() async {  // confusing name
   const url = "https://dev.peartrade.org/api/search/category";
   var token;
 

lib/common/widgets/future_dropdownmenu.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/material.dart';
+
+class DropDownMenu extends StatefulWidget {
+
+  final List<DropdownMenuItem> items;
+  final Function onChanged;
+  final String value;
+  
+  DropDownMenu({
+    this.items,
+    this.onChanged,
+    this.value,
+  });
+
+  @override
+  _DropDownMenuState createState() => _DropDownMenuState(items: this.items, onNewValue: this.onChanged, value: this.value);
+}
+
+class _DropDownMenuState extends State<DropDownMenu> {
+
+  final List<DropdownMenuItem> items;
+  final Function onNewValue;
+  final String value;
+
+  _DropDownMenuState({
+    this.items,
+    this.onNewValue,
+    this.value
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return new DropdownButton(value: this.value, items: this.items, onChanged: (newValue) => onNewValue(newValue),);
+  }
+}