/**
* Build data for contribution form with create action
*
* @param AccountContribution $existContribution
* @return AccountContribution
* @throws \Exception
*/
private function buildUpdateContributionData(AccountContribution $existContribution = null)
{
if (!$existContribution || $existContribution->isOneTimeContribution()) {
throw new \Exception('No object with auto-invest instructions for update.');
}
return $existContribution;
}
