/**
	 * @param Gpf_SqlBuilder_Filter $filter
	 * @return Gpf_SqlBuilder_CompoundWhereCondition
	 */
	private function getPayoutMethodsCondition(Gpf_SqlBuilder_Filter $filter) {
		$condition = new Gpf_SqlBuilder_CompoundWhereCondition();

		$values = explode(',', $filter->getValue());
		foreach ($values as $value) {
			if ($value === 'null') {
				$condition->add("pu.payoutoptionid", '=', null, 'OR', $filter->getOperator("IN")->getDoQuote());
				$condition->add("pu.payoutoptionid", '=', '', 'OR', $filter->getOperator("IN")->getDoQuote());
				continue;
			}
			$condition->add("pu.payoutoptionid", '=', $value, 'OR', $filter->getOperator("IN")->getDoQuote());
		}
		return $condition;
	}