Adding JSON example. (#1)

jsonexample/lib/built_value/built_value_serializers.g.dart

@@ -0,0 +1,45 @@
+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of serializers;
+
+// **************************************************************************
+// Generator: BuiltValueGenerator
+// **************************************************************************
+
+// ignore_for_file: always_put_control_body_on_new_line
+// ignore_for_file: annotate_overrides
+// ignore_for_file: avoid_annotating_with_dynamic
+// ignore_for_file: avoid_returning_this
+// ignore_for_file: omit_local_variable_types
+// ignore_for_file: prefer_expression_function_bodies
+// ignore_for_file: sort_constructors_first
+
+Serializers _$serializers = (new Serializers().toBuilder()
+      ..add(BuiltComplexObject.serializer)
+      ..add(BuiltSimpleObject.serializer)
+      ..addBuilderFactory(
+          const FullType(BuiltList, const [const FullType(String)]),
+          () => new ListBuilder<String>())
+      ..addBuilderFactory(
+          const FullType(BuiltList, const [const FullType(int)]),
+          () => new ListBuilder<int>())
+      ..addBuilderFactory(
+          const FullType(BuiltList, const [const FullType(double)]),
+          () => new ListBuilder<double>())
+      ..addBuilderFactory(
+          const FullType(BuiltList, const [const FullType(String)]),
+          () => new ListBuilder<String>())
+      ..addBuilderFactory(
+          const FullType(BuiltList, const [const FullType(int)]),
+          () => new ListBuilder<int>())
+      ..addBuilderFactory(
+          const FullType(BuiltList, const [const FullType(double)]),
+          () => new ListBuilder<double>())
+      ..addBuilderFactory(
+          const FullType(BuiltList, const [const FullType(BuiltSimpleObject)]),
+          () => new ListBuilder<BuiltSimpleObject>()))
+    .build();