Retrieves the strictest version of each policy rule from a list of booking policies.
Returns a hypothetical bookingPolicy object that combines the strictest
version of each rule. The id of the returned policy is null and no
corresponding bookingPolicy object is created. To create a new policy, you
can call Create Booking Policy
(SDK | REST).
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.