/* * Copyright 2019 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> NS_ASSUME_NONNULL_BEGIN /** * A generic class to combine several handler blocks into a single block in a thread-safe manner */ @interface FIRInstanceIDCombinedHandler<ResultType> : NSObject - (void)addHandler:(void (^)(ResultType _Nullable result, NSError* _Nullable error))handler; - (void (^)(ResultType _Nullable result, NSError* _Nullable error))combinedHandler; @end NS_ASSUME_NONNULL_END