public ColumnSegment getColumn(final int index) {
        return columns.get(index);
    }
@Test
    void assertGetColumn() {
        Object literalObject = new Object();
        Collection<ColumnAssignmentSegment> assignments = createLiteralExpressionSegment(literalObject);
        OnDuplicateUpdateContext onDuplicateUpdateContext = new OnDuplicateUpdateContext(assignments, Collections.emptyList(), 0);
        ColumnSegment column = onDuplicateUpdateContext.getColumn(0);
        assertThat(column, is(assignments.iterator().next().getColumns().get(0)));
    }