private Set<Method> findAnnotatedMethods(final Class<?> clazz) {
        return MethodIntrospector.selectMethods(clazz, EXCEPTION_HANDLER_METHODS);
    }
A filter for selecting {@code @GrpcExceptionHandler} methods.
grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/advice/GrpcAdviceDiscoverer.java