Lack of 'createVdnScope' Method

I'm trying to use the NSX plug-in to automate the creation of Transport Zones within our NSX environment.  I can query for them through the plug-in but there is no Create Method like there is for Logical Switches (via the 'createVirtualWire' Method).

I'm able to do this with the REST API but why isn't this included in the NSX plug-in for Orchestrator?

Any info would be helpful as I'd prefer my solution to not have to span multiple methods.

Thanks,