private function getAssignableParents($dim_id, $otype_id)
 {
     $parents = Members::findAll(array("conditions" => array("`object_type_id` IN (\n\t\t\tSELECT `parent_object_type_id` FROM `" . DimensionObjectTypeHierarchies::instance()->getTableName() . "` WHERE `dimension_id` = ? AND `child_object_type_id` = ?\n\t\t)", $dim_id, $otype_id)));
     $parents_info = array();
     foreach ($parents as $parent) {
         $parents_info[] = array('id' => $parent->getId(), 'name' => $parent->getName());
     }
     $dim_obj_type = DimensionObjectTypes::findById(array('dimension_id' => $dim_id, 'object_type_id' => $otype_id));
     if ($dim_obj_type && $dim_obj_type->getIsRoot()) {
         array_unshift($parents_info, array('id' => 0, 'name' => lang('none')));
     }
     return $parents_info;
 }