'Varchar' ]; private static $has_one = [ 'CEO' => CEO::class, 'PreviousCEO' => CEO::class, 'Owner' => DataObject::class // polymorphic ]; private static $has_many = array( 'CurrentStaff' => 'SilverStripe\\ORM\\Tests\\DataObjectTest\\Staff.CurrentCompany', 'PreviousStaff' => 'SilverStripe\\ORM\\Tests\\DataObjectTest\\Staff.PreviousCompany' ); }