@Bean
        GlobalClientInterceptorConfigurer globalClientInterceptorConfigurer() {
            return interceptors -> interceptors.add(new ConfigurerClientInterceptor());
        }
Tests that {@link GrpcGlobalClientInterceptor}, {@link GlobalClientInterceptorConfigurer} and
{@link GlobalClientInterceptorRegistry} work as expected.
tests/src/test/java/net/devh/boot/grpc/test/interceptor/PickupClientInterceptorTest.java