public Optional<String> getDerivedColumnName() {
        return Optional.ofNullable(derivedColumnName);
    }
@Test
    void assertGetDerivedColumnName() {
        GroupedParameterBuilder actual = new GroupedParameterBuilder(createGroupedParameters(), createGenericParameters());
        String derivedColumnName = "derivedColumnName";
        actual.setDerivedColumnName(derivedColumnName);
        assertThat(actual.getDerivedColumnName(), is(Optional.of(derivedColumnName)));
    }