public Where getColumns() {
        return new Where("Columns");
    }
@Test
    void queryFirstColumn() throws Exception {

        queryableIndex.getColumns()
                .where(Column.index()
                        .any())
                .select()
                .first(firstColumnQueryCallback);

        verify(firstColumnQueryCallback).callback(firstColumnArgumentCaptor.capture());

        assertThat(firstColumnArgumentCaptor.getValue()).isEqualTo(firstColumn);
    }