Migrate desktop_photo_search to top level (#1002)

desktop_photo_search/material/lib/src/unsplash/location.dart

@@ -0,0 +1,39 @@
+// Copyright 2019 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:convert';
+
+import 'package:built_value/built_value.dart';
+import 'package:built_value/serializer.dart';
+
+import '../serializers.dart';
+import 'position.dart';
+
+part 'location.g.dart';
+
+abstract class Location implements Built<Location, LocationBuilder> {
+  factory Location([void Function(LocationBuilder)? updates]) = _$Location;
+
+  Location._();
+
+  @BuiltValueField(wireName: 'city')
+  String? get city;
+
+  @BuiltValueField(wireName: 'country')
+  String? get country;
+
+  @BuiltValueField(wireName: 'position')
+  Position? get position;
+
+  String toJson() {
+    return json.encode(serializers.serializeWith(Location.serializer, this));
+  }
+
+  static Location? fromJson(String jsonString) {
+    return serializers.deserializeWith(
+        Location.serializer, json.decode(jsonString));
+  }
+
+  static Serializer<Location> get serializer => _$locationSerializer;
+}