puppet service_example on windows

[grant little]

Trying to get an example to run from the registry windows package https://github.com/puppetlabs/puppetlabs-windows

for some reason it is balking on the example code like so:

Running Puppet agent on demand ...

Info: Using configured environment 'production'

Info: Retrieving pluginfacts

Info: Retrieving plugin

Info: Loading facts

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Evaluation Error: Error while evaluating a Resource Statement, Evaluation Error: No m

atching entry for selector parameter with value 'UNSET' at /etc/puppetlabs/code/environments/production/modules/registry/manifests/service.pp:51:18 at /etc/pupp

etlabs/code/environments/production/modules/registry/manifests/service_example.pp:20 on node mynode

Warning: Not using cache on failed catalog

Error: Could not retrieve catalog; skipping run

Press any key to continue . . .

Here the lines around /service.pp:51:18 :

  $ensure_real = $ensure ? {

    UNSET   => present,

    undef   => present,

    present => present,

    absent  => absent,

  }

This is the code as provied from git and I'm a newbie to puppet so I don't much clue what the line 

UNSET => present,

is trying to do.

Any ideas?