Get a custom attribute and store it in a workflow attribute?

Hi.

Maybe I'm confused about this but from the looks of it, I can't seem to take the custom attribute that's retrieved using

com.vmware.library.vc.customattribute.getCustomField()

and assign it to a workflow attribute for use later on or for even checking the value.

From the looks of the workflow, it just logs the value.

Is there a way to do this natively in vRO?

thanks!

Anoop