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-rw-r--r--Firestore/Source/Local/FSTWriteGroupTracker.h50
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diff --git a/Firestore/Source/Local/FSTWriteGroupTracker.h b/Firestore/Source/Local/FSTWriteGroupTracker.h
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--- a/Firestore/Source/Local/FSTWriteGroupTracker.h
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-/*
- * Copyright 2017 Google
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#import <Foundation/Foundation.h>
-#import "Firestore/core/src/firebase/firestore/local/leveldb_transaction.h"
-
-@class FSTWriteGroup;
-
-NS_ASSUME_NONNULL_BEGIN
-
-/**
- * Helper class for FSTPersistence implementations to create WriteGroups and verify internal
- * contracts are maintained:
- * 1. Can't create a group when an uncommitted group exists (no nesting).
- * 2. Can't commit a group that differs from the last created one.
- */
-@interface FSTWriteGroupTracker : NSObject
-
-/** Creates and returns an FSTWriteGroupTracker instance. */
-+ (instancetype)tracker;
-
-/**
- * Verifies there's no active group already and then creates a new group and stores it for later
- * validation with `endGroup`.
- */
-- (FSTWriteGroup *)startGroupWithAction:(NSString *)action;
-
-- (FSTWriteGroup *)startGroupWithAction:(NSString *)action
- transaction:
- (firebase::firestore::local::LevelDbTransaction *)transaction;
-
-/** Ends a group previously started with `startGroupWithAction`. */
-- (void)endGroup:(FSTWriteGroup *)group;
-
-@end
-
-NS_ASSUME_NONNULL_END