src/CI_Base_Model.php
public function delete_by_at($condition, $time)
    {
        $this->prevent_if_not_soft_deletable();
        $this->_set_where($condition);

        return $this->_delete($condition, $time);
    }
public function delete_by_at($condition, $time)
    {
        $this->prevent_if_not_soft_deletable();
        $this->_set_where($condition);

        return $this->_delete($condition, $time);
    }
Alias for delete_by

@param $condition
@param $time
@return bool|mixed|void