diff --git a/demo_test/vendor/google.golang.org/protobuf/internal/impl/message_reflect_gen.go b/demo_test/vendor/google.golang.org/protobuf/internal/impl/message_reflect_gen.go
new file mode 100644
index 0000000..7d65f5c
--- /dev/null
+++ b/demo_test/vendor/google.golang.org/protobuf/internal/impl/message_reflect_gen.go
@@ -0,0 +1,249 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Code generated by generate-types. DO NOT EDIT.
+
+package impl
+
+import (
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/runtime/protoiface"
+)
+
+func (m *messageState) Descriptor() protoreflect.MessageDescriptor {
+	return m.messageInfo().Desc
+}
+func (m *messageState) Type() protoreflect.MessageType {
+	return m.messageInfo()
+}
+func (m *messageState) New() protoreflect.Message {
+	return m.messageInfo().New()
+}
+func (m *messageState) Interface() protoreflect.ProtoMessage {
+	return m.protoUnwrap().(protoreflect.ProtoMessage)
+}
+func (m *messageState) protoUnwrap() interface{} {
+	return m.pointer().AsIfaceOf(m.messageInfo().GoReflectType.Elem())
+}
+func (m *messageState) ProtoMethods() *protoiface.Methods {
+	m.messageInfo().init()
+	return &m.messageInfo().methods
+}
+
+// ProtoMessageInfo is a pseudo-internal API for allowing the v1 code
+// to be able to retrieve a v2 MessageInfo struct.
+//
+// WARNING: This method is exempt from the compatibility promise and
+// may be removed in the future without warning.
+func (m *messageState) ProtoMessageInfo() *MessageInfo {
+	return m.messageInfo()
+}
+
+func (m *messageState) Range(f func(protoreflect.FieldDescriptor, protoreflect.Value) bool) {
+	m.messageInfo().init()
+	for _, ri := range m.messageInfo().rangeInfos {
+		switch ri := ri.(type) {
+		case *fieldInfo:
+			if ri.has(m.pointer()) {
+				if !f(ri.fieldDesc, ri.get(m.pointer())) {
+					return
+				}
+			}
+		case *oneofInfo:
+			if n := ri.which(m.pointer()); n > 0 {
+				fi := m.messageInfo().fields[n]
+				if !f(fi.fieldDesc, fi.get(m.pointer())) {
+					return
+				}
+			}
+		}
+	}
+	m.messageInfo().extensionMap(m.pointer()).Range(f)
+}
+func (m *messageState) Has(fd protoreflect.FieldDescriptor) bool {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		return fi.has(m.pointer())
+	} else {
+		return m.messageInfo().extensionMap(m.pointer()).Has(xt)
+	}
+}
+func (m *messageState) Clear(fd protoreflect.FieldDescriptor) {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		fi.clear(m.pointer())
+	} else {
+		m.messageInfo().extensionMap(m.pointer()).Clear(xt)
+	}
+}
+func (m *messageState) Get(fd protoreflect.FieldDescriptor) protoreflect.Value {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		return fi.get(m.pointer())
+	} else {
+		return m.messageInfo().extensionMap(m.pointer()).Get(xt)
+	}
+}
+func (m *messageState) Set(fd protoreflect.FieldDescriptor, v protoreflect.Value) {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		fi.set(m.pointer(), v)
+	} else {
+		m.messageInfo().extensionMap(m.pointer()).Set(xt, v)
+	}
+}
+func (m *messageState) Mutable(fd protoreflect.FieldDescriptor) protoreflect.Value {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		return fi.mutable(m.pointer())
+	} else {
+		return m.messageInfo().extensionMap(m.pointer()).Mutable(xt)
+	}
+}
+func (m *messageState) NewField(fd protoreflect.FieldDescriptor) protoreflect.Value {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		return fi.newField()
+	} else {
+		return xt.New()
+	}
+}
+func (m *messageState) WhichOneof(od protoreflect.OneofDescriptor) protoreflect.FieldDescriptor {
+	m.messageInfo().init()
+	if oi := m.messageInfo().oneofs[od.Name()]; oi != nil && oi.oneofDesc == od {
+		return od.Fields().ByNumber(oi.which(m.pointer()))
+	}
+	panic("invalid oneof descriptor")
+}
+func (m *messageState) GetUnknown() protoreflect.RawFields {
+	m.messageInfo().init()
+	return m.messageInfo().getUnknown(m.pointer())
+}
+func (m *messageState) SetUnknown(b protoreflect.RawFields) {
+	m.messageInfo().init()
+	m.messageInfo().setUnknown(m.pointer(), b)
+}
+func (m *messageState) IsValid() bool {
+	return !m.pointer().IsNil()
+}
+
+func (m *messageReflectWrapper) Descriptor() protoreflect.MessageDescriptor {
+	return m.messageInfo().Desc
+}
+func (m *messageReflectWrapper) Type() protoreflect.MessageType {
+	return m.messageInfo()
+}
+func (m *messageReflectWrapper) New() protoreflect.Message {
+	return m.messageInfo().New()
+}
+func (m *messageReflectWrapper) Interface() protoreflect.ProtoMessage {
+	if m, ok := m.protoUnwrap().(protoreflect.ProtoMessage); ok {
+		return m
+	}
+	return (*messageIfaceWrapper)(m)
+}
+func (m *messageReflectWrapper) protoUnwrap() interface{} {
+	return m.pointer().AsIfaceOf(m.messageInfo().GoReflectType.Elem())
+}
+func (m *messageReflectWrapper) ProtoMethods() *protoiface.Methods {
+	m.messageInfo().init()
+	return &m.messageInfo().methods
+}
+
+// ProtoMessageInfo is a pseudo-internal API for allowing the v1 code
+// to be able to retrieve a v2 MessageInfo struct.
+//
+// WARNING: This method is exempt from the compatibility promise and
+// may be removed in the future without warning.
+func (m *messageReflectWrapper) ProtoMessageInfo() *MessageInfo {
+	return m.messageInfo()
+}
+
+func (m *messageReflectWrapper) Range(f func(protoreflect.FieldDescriptor, protoreflect.Value) bool) {
+	m.messageInfo().init()
+	for _, ri := range m.messageInfo().rangeInfos {
+		switch ri := ri.(type) {
+		case *fieldInfo:
+			if ri.has(m.pointer()) {
+				if !f(ri.fieldDesc, ri.get(m.pointer())) {
+					return
+				}
+			}
+		case *oneofInfo:
+			if n := ri.which(m.pointer()); n > 0 {
+				fi := m.messageInfo().fields[n]
+				if !f(fi.fieldDesc, fi.get(m.pointer())) {
+					return
+				}
+			}
+		}
+	}
+	m.messageInfo().extensionMap(m.pointer()).Range(f)
+}
+func (m *messageReflectWrapper) Has(fd protoreflect.FieldDescriptor) bool {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		return fi.has(m.pointer())
+	} else {
+		return m.messageInfo().extensionMap(m.pointer()).Has(xt)
+	}
+}
+func (m *messageReflectWrapper) Clear(fd protoreflect.FieldDescriptor) {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		fi.clear(m.pointer())
+	} else {
+		m.messageInfo().extensionMap(m.pointer()).Clear(xt)
+	}
+}
+func (m *messageReflectWrapper) Get(fd protoreflect.FieldDescriptor) protoreflect.Value {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		return fi.get(m.pointer())
+	} else {
+		return m.messageInfo().extensionMap(m.pointer()).Get(xt)
+	}
+}
+func (m *messageReflectWrapper) Set(fd protoreflect.FieldDescriptor, v protoreflect.Value) {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		fi.set(m.pointer(), v)
+	} else {
+		m.messageInfo().extensionMap(m.pointer()).Set(xt, v)
+	}
+}
+func (m *messageReflectWrapper) Mutable(fd protoreflect.FieldDescriptor) protoreflect.Value {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		return fi.mutable(m.pointer())
+	} else {
+		return m.messageInfo().extensionMap(m.pointer()).Mutable(xt)
+	}
+}
+func (m *messageReflectWrapper) NewField(fd protoreflect.FieldDescriptor) protoreflect.Value {
+	m.messageInfo().init()
+	if fi, xt := m.messageInfo().checkField(fd); fi != nil {
+		return fi.newField()
+	} else {
+		return xt.New()
+	}
+}
+func (m *messageReflectWrapper) WhichOneof(od protoreflect.OneofDescriptor) protoreflect.FieldDescriptor {
+	m.messageInfo().init()
+	if oi := m.messageInfo().oneofs[od.Name()]; oi != nil && oi.oneofDesc == od {
+		return od.Fields().ByNumber(oi.which(m.pointer()))
+	}
+	panic("invalid oneof descriptor")
+}
+func (m *messageReflectWrapper) GetUnknown() protoreflect.RawFields {
+	m.messageInfo().init()
+	return m.messageInfo().getUnknown(m.pointer())
+}
+func (m *messageReflectWrapper) SetUnknown(b protoreflect.RawFields) {
+	m.messageInfo().init()
+	m.messageInfo().setUnknown(m.pointer(), b)
+}
+func (m *messageReflectWrapper) IsValid() bool {
+	return !m.pointer().IsNil()
+}