/**
* @param null|mixed $value
*/
function update_value($value = null)
{
if (!is_null($value)) {
$this->set_value($value);
}
if ($this->has_storage()) {
$this->storage->update_value($this->value());
}
}
/**
* @return bool
*/
function has_field()
{
$field_name = $this->field->field_name;
return property_exists($this->object, $field_name) && parent::has_field($field_name);
}