@Override
                public boolean isApplicable(final Class<? extends AbstractStub<?>> stubType) {
                    return CustomStub.class.isAssignableFrom(stubType);
                }
Test should cover bean method injection via {@link Autowired} and {@link Qualifier} from context
tests/src/test/java/net/devh/boot/grpc/test/inject/GrpcClientBeanInjectionTest.java