@Test
public void getUcscId() {

    assertThat(EMPTY_GENE_IDENTIFIER.getUcscId(), equalTo(GeneIdentifier.EMPTY_FIELD));
    GeneIdentifier instance = GeneIdentifier.builder()
            .ucscId("ucscId")
            .build();
    assertThat(instance.getUcscId(), equalTo("ucscId"));
}