Get a List of Dashboards under a Dashboard Group

Hello Experts,

I am looking to write a Dashboard Extender rule by which I can fetch the list of all the dashboards under a Dashboard Group and set the value as a delimited list to a Parameter.  Is it possible ? 

The idea is to dynamically populate a list with new Dashboards as they are added.  Please suggest other workarounds if the above is not feasible. 

Many Thanks