@Test
public void testGetSampleGenotype() {

    SampleGenotype sampleGenotype = SampleGenotype.of(AlleleCall.REF, AlleleCall.ALT);
    Map<String, SampleGenotype> sampleGenotypes = ImmutableMap.of("Zaphod", sampleGenotype);
    instance = testVariantBuilder()
            .sampleGenotypes(sampleGenotypes)
            .build();
    assertThat(instance.getSampleGenotype("Zaphod"), equalTo(sampleGenotype));
    assertThat(instance.getSampleGenotype("Nemo"), equalTo(SampleGenotype.empty()));
}