Templating with pre-filled code / values

I’m trying out the template-feature of URCaps.

			root.addChild(nf.createMoveNode());
  	root.addChild(nf.createAssignmentNode());
			root.addChild(nf.createSetNode());

Is it possible to “fill-out” the created template with preset values ?
E.g. for the createAssignmentNode(), I would like to “preset” it with variable name and default value.

best regards.