Create Booked Order endpoint lists billing as required but wasn't actually required

Hi RR support,

I'm using the create booked order endpoint (https://roserocket.readme.io/v1.0/reference/create-booked-order). The API docs list "billing" as "required". However I tried a POST request where I did not specify billing in the JSON, but it still worked (the order that was created looks like it got the billing address from the customer info that already exists in Roserocket).

Just checking if this is the intended behavior, since I'm planning to not provide a billing object in my API calls from my application, but I also don't want my app to break if later on Roserocket starts validating that the billing object is there.