diff --git a/vendor/google.golang.org/protobuf/internal/genid/goname.go b/vendor/google.golang.org/protobuf/internal/genid/goname.go
new file mode 100644
index 0000000..693d2e9
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/genid/goname.go
@@ -0,0 +1,25 @@
+// 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 genid
+
+// Go names of implementation-specific struct fields in generated messages.
+const (
+	State_goname = "state"
+
+	SizeCache_goname  = "sizeCache"
+	SizeCacheA_goname = "XXX_sizecache"
+
+	WeakFields_goname  = "weakFields"
+	WeakFieldsA_goname = "XXX_weak"
+
+	UnknownFields_goname  = "unknownFields"
+	UnknownFieldsA_goname = "XXX_unrecognized"
+
+	ExtensionFields_goname  = "extensionFields"
+	ExtensionFieldsA_goname = "XXX_InternalExtensions"
+	ExtensionFieldsB_goname = "XXX_extensions"
+
+	WeakFieldPrefix_goname = "XXX_weak_"
+)