env/protobuf-3.17.0/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
 * GPBExtensionRegistry for all the extensions defined by that file and
 * the files it depends on.
 **/
@interface GPBRootObject : NSObject

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

@end

NS_ASSUME_NONNULL_END