1*a0c32e93SBen Langmuir @interface A 2*a0c32e93SBen Langmuir -(void)method1; 3*a0c32e93SBen Langmuir @end 4*a0c32e93SBen Langmuir @interface B 5*a0c32e93SBen Langmuir -(void)method1 __attribute__((unavailable)); 6*a0c32e93SBen Langmuir @end 7