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/*
* Copyright 2018 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 dependency on a specific protocol's functionality.
NS_SWIFT_NAME(Dependency)
@interface FIRDependency : NSObject
/// The protocol describing functionality being depended on.
@property(nonatomic, strong, readonly) Protocol *protocol;
/// A flag to specify if the dependency is required or not.
@property(nonatomic, readonly) BOOL isRequired;
/// Initializes a dependency that is required. Calls `initWithProtocol:isRequired` with `YES` for
/// the required parameter.
/// Creates a required dependency on the specified protocol's functionality.
+ (instancetype)dependencyWithProtocol:(Protocol *)protocol;
/// Creates a dependency on the specified protocol's functionality and specify if it's required for
/// the class's functionality.
+ (instancetype)dependencyWithProtocol:(Protocol *)protocol isRequired:(BOOL)required;
/// Use `dependencyWithProtocol:isRequired:` instead.
- (instancetype)init NS_UNAVAILABLE;
@end
NS_ASSUME_NONNULL_END
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