function test_delete_by_composite_pks()
{
$finder = DepSections::finder();
$this->assertEquals($finder->deleteByPk(array(100, 101)), 0);
$this->assertEquals($finder->deleteByPk(array(100, 101), array(102, 103)), 0);
$this->assertEquals($finder->deleteByPk(array(array(100, 101), array(102, 103))), 0);
}