"addAProductToTheDeal..." params

Can anyone reference or show me what the parameters are for the addAProductToTheDealEventuallyCreatingANewItemCalledADealProduct API command?

the official documentation has a “TODO”… so not much help there

the best I have found is:
$data = array(
“id” => $dealID,
“body” => array(
“id” => $productID
)
);
$response = $deals->addAProductToTheDealEventuallyCreatingANewItemCalledADealProduct($data);