atk4\data\Model::_unset PHP Method

    public function _unset($name)
    {
        $name = $this->normalizeFieldName($name);
        if (array_key_exists($name, $this->dirty)) {
            $this->data[$name] = $this->dirty[$name];
            unset($this->dirty[$name]);
        }
        return $this;
    }