@Test
 public void fromTest() {
   assertThat(converter.from(null)).isNull();
   assertThat(converter.from((byte) 0)).isFalse();
   assertThat(converter.from((byte) 1)).isTrue();
   assertThat(converter.from((byte) 2)).isTrue();
 }
 @Test
 public void toTest() {
   assertThat(converter.to(null)).isNull();
   assertThat(converter.to(true)).isEqualTo((byte) 1);
   assertThat(converter.to(false)).isEqualTo((byte) 0);
 }