OCS Share API - why is not possible to 'hide download' when creating a new share?

When creating a new share via the OCS API, why is not possible to specify ‘hide download’ as a POST argument / parameter? All the other options seem to be available that you can do via the web interface e.g. add note, expiry date, password etc but not the hide download property. Is this feature only available on the enterprise version, or will it be added to the free version at some point?

TIA for your help