datagroup in the content security policy

Hi,

We have a functional irule with the following csp:

when HTTP_RESPONSE {

 if { [HTTP::header X-AH-Environment] contains "dev" }

   {

                HTTP::header insert "Content-Security-Policy" "media-src https://abc.com https://xyz.com blob: *"

                HTTP::header insert "X-XSS-Protection" "1; mode=block"

                HTTP::header insert "X-Content-Type-Options" "nosniff"

                HTTP::header insert "Strict-Transport-Security" "max-age=31536000; includeSubDomains"

   }

We would like to use a data group in the media-src to add more client urls in future.

Is there a way I can define a variable to point to the data group and invoke $variable in the csp?

Thanks,

Ravi