protected function updateChilds() {
		foreach($this->fields as $name=>$field) {
			if($field instanceof self) {
				$field->setData(
					(isset($this->data[$name]) ? $this->data[$name]:[])
				);
			}
			elseif($field instanceof Field) {
				if(isset($this->data[$name]))
					$field->setValue($this->data[$name]);
				elseif($this->sent())
					$field->setValue(null);
			}
		}
	}