TradeBindingEntity::onFieldModify

protected function onFieldModify($name, $oldValue, $value)
{
	$result = parent::onFieldModify($name, $oldValue, $value);
	if (!$result->isSuccess())
	{
		return $result;
	}

	if ($name === 'TRADING_PLATFORM_ID')
	{
		$this->tradePlatform = null;
	}

	return $result;
}