function test_nested_tree_query() { parent::test_nested_tree(); }
function test_nested_set_creation() { parent::test_nested_tree(); }
function test_nested_tree_manipulation() { parent::test_nested_tree(); }
function test_nested_tree_query() { parent::test_nested_tree(); }
function test_nested_set_creation() { parent::test_nested_tree(); }
function test_nested_tree_manipulation() { parent::test_nested_tree(); }