protected function can_backup(field_controller $field, int $instanceid) : bool {
        return $this->can_view($field, $instanceid) || $this->can_edit($field, $instanceid);
    }
protected function can_backup(field_controller $field, int $instanceid) : bool {
        return $this->can_view($field, $instanceid) || $this->can_edit($field, $instanceid);
    }
protected function can_backup ( field_controller $ field , int $ instanceid ) : bool { return $ this -> can_view ( $ field , $ instanceid ) || $ this -> can_edit ( $ field , $ instanceid ) ; }
Checks if current user can backup a given field

Capability to backup the instance does not need to be checked here

@param field_controller $field
@param int $instanceid
@return bool
Checks if current user can backup a given field