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1// RUN: %clang_cc1 -verify -Wno-objc-root-class %s2// expected-no-diagnostics3 4@protocol MyProto1 5@optional6- (void) FOO;7@optional8- (void) FOO1;9@optional 10- (void) REQ;11@optional12@end13 14@interface MyProto2 <MyProto1>15- (void) FOO2;16- (void) FOO3;17@end18 19@implementation MyProto220- (void) FOO2{}21- (void) FOO3{}22@end23