js/test3.proto

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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//
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syntax = "proto2";

package jspb.exttest;

option java_package = "com.google.apps.jspb.proto";
option java_multiple_files = true;

message TestExtensionsMessage {
  optional int32 intfield = 1;
  extensions 100 to max;
}

message ExtensionMessage {
  extend TestExtensionsMessage {
    optional ExtensionMessage ext_field = 100;
  }
  optional string ext1 = 1;
}

extend TestExtensionsMessage {
  optional ExtensionMessage floating_msg_field = 101;
  optional string floating_str_field = 102;
}