features this- DbItems setRoot features_items_root setType features_it

$features = $this->DbItems
	  ->setRoot('features_items_root')
	  ->setType('features_items_type')
	  ->setQuality()
	  ->setAssignments(array(
							'type'         => 'course_page',
							'relationship' => 'list',
							'record_id'    => $this->config->item('course_page_item_id')
					   ))
	  ->get();