Docgen of yangmodels requires setting unknown parameter 'access-control-origin'

MD-SAL:Restconf_API_Explorer describes the use of docgen to present the yang models loaded in a Human readable format.

https://wiki.opendaylight.org/view/OpenDaylight_Controller:MD-SAL:Restconf_API_Explorer

Following instructions on page above I visited the url http://localhost:8080/apidoc/explorer/# I received the response

"Below are the list of APIs supported by the Controller.
Loading http://localhost:8080/apidoc/apis
Can't read from server. It may not have the appropriate access-control-origin settings."

I am not sure of the next step and cannot find more information about 'access-control-origin' in the opendaylight documentation.

I expected an explanation of how to do this.

Version

org.opendaylight.controller.version = 0.1
org.opendaylight.controller.build.scm.version = ce223a4e4d74daee6854e00e9d4e5d3a1bd5c1e8
org.opendaylight.controller.build.user = jenkins-controller
org.opendaylight.controller.build.workspace = **********
org.opendaylight.controller.build.timestamp = 1409424414421
org.opendaylight.controller.build.machine = **********
~