@Override
    public ScalarOperator visitCastOperator(CastOperator operator, Void context) {
        return shuttleIfUpdate(operator);
    }
@Test
    void visitCastOperator() {
        CastOperator operator = new CastOperator(INT, new ColumnRefOperator(1, INT, "id", true));
        {
            ScalarOperator newOperator = shuttle.visitCastOperator(operator, null);
            assertEquals(operator, newOperator);
        }
        {
            ScalarOperator newOperator = shuttle2.visitCastOperator(operator, null);
            assertEquals(operator, newOperator);
        }
    }