@Test
 public void Variables_NotEquals() {
   assertThat(FilterGroup_1.getSubGroups()).isNotEqualTo(subGroups_2);
   assertThat(FilterGroup_1.getFilters()).isNotEqualTo(filters_2);
   assertThat(FilterGroup_1.getOperator()).isNotEqualTo(DatabaseFilterOperator.OR);
 }
 @Test
 public void Variables_AreEquals() {
   assertThat(FilterGroup_1.getSubGroups()).isEqualTo(subGroups_1);
   assertThat(FilterGroup_1.getFilters()).isEqualTo(filters_1);
   assertThat(FilterGroup_1.getOperator()).isEqualTo(DatabaseFilterOperator.AND);
 }