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// Copyright 2016 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.
// Protocol messages used to record the state of the model type store for USS.
// At the time of writing, the model type store uses leveldb, a schemaless
// key-value store. This means that the database's schema is mostly implicit.
// This descriptor isn't intended to fully describe the schema, just keep track
// of which major changes have been applied.
syntax = "proto2";
option optimize_for = LITE_RUNTIME;
package sync_pb;
message ModelTypeStoreSchemaDescriptor {
optional int64 version_number = 1;