This API is subject to change. Bug fixes and new features will be released based on developer feedback throughout the preview period.
Sets a booking policy as the default.
Also updates the site's current default policy by setting its default
attribute to false. If the provided policy is already the site's
default, the call succeeds without changing any bookingPolicy object.
You can only call this method when authenticated as a Wix app or Wix user identity.
ID of the booking policy that's set as default.