Use mattermost v5 module (#1192)

vendor/google.golang.org/protobuf/proto/reset.go

@@ -0,0 +1,43 @@
+// Copyright 2019 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.
+
+package proto
+
+import (
+	"fmt"
+
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+// Reset clears every field in the message.
+// The resulting message shares no observable memory with its previous state
+// other than the memory for the message itself.
+func Reset(m Message) {
+	if mr, ok := m.(interface{ Reset() }); ok && hasProtoMethods {
+		mr.Reset()
+		return
+	}
+	resetMessage(m.ProtoReflect())
+}
+
+func resetMessage(m protoreflect.Message) {
+	if !m.IsValid() {
+		panic(fmt.Sprintf("cannot reset invalid %v message", m.Descriptor().FullName()))
+	}
+
+	// Clear all known fields.
+	fds := m.Descriptor().Fields()
+	for i := 0; i < fds.Len(); i++ {
+		m.Clear(fds.Get(i))
+	}
+
+	// Clear extension fields.
+	m.Range(func(fd protoreflect.FieldDescriptor, _ protoreflect.Value) bool {
+		m.Clear(fd)
+		return true
+	})
+
+	// Clear unknown fields.
+	m.SetUnknown(nil)
+}