ObjectNormalizer::paymentsNormalize

public function paymentsNormalize()
{
	$r=[];
	/** @var Payment $payment */
	foreach($this->getOrder()->getPaymentCollection() as $payment)
	{
		$externalFields = isset($this->externalFields['PAYMENTS'][$payment->getInternalIndex()])?
			$this->externalFields['PAYMENTS'][$payment->getInternalIndex()]:[];

		$r[$payment->getInternalIndex()] = array_merge(
				$externalFields,
				$payment->getFieldValues()
		);
	}
	$this->fields['ORDER']['PAYMENTS']=$r;
	return $this;
}