public ServiceBuilder<U> generic(String generic) {
        this.generic = generic;
        return getThis();
    }
@Test
    void generic() throws Exception {
        ServiceBuilder builder = new ServiceBuilder();
        builder.generic(GENERIC_SERIALIZATION_DEFAULT);
        assertThat(builder.build().getGeneric(), equalTo(GENERIC_SERIALIZATION_DEFAULT));
        builder.generic(GENERIC_SERIALIZATION_NATIVE_JAVA);
        assertThat(builder.build().getGeneric(), equalTo(GENERIC_SERIALIZATION_NATIVE_JAVA));
        builder.generic(GENERIC_SERIALIZATION_BEAN);
        assertThat(builder.build().getGeneric(), equalTo(GENERIC_SERIALIZATION_BEAN));
    }