protobuf/objectivec/GPBRootObject.h

// Protocol Buffers - Google's data interchange format
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#import <Foundation/Foundation.h>

@class GPBExtensionRegistry;

NS_ASSUME_NONNULL_BEGIN

/// Every generated proto file defines a local "Root" class that exposes a
/// @c GPBExtensionRegistry for all the extensions defined by that file and
/// the files it depends on.
@interface GPBRootObject : NSObject

/// An extension registry for the given file and all the files it depends on.
+ (GPBExtensionRegistry *)extensionRegistry;

@end

NS_ASSUME_NONNULL_END