DSL how to write "exchange.getOut().setBody(responsePayload);"

hi all

i am facing to a simple need but i can't find any response :

i have to return a value to my cxfEndpoint without coding any Processor (as
i want to be full DSL EIP compliant), is there a trick or a maner to code
the line exchange.getOut().setBody(responsePayload); seen in every processor
in a pure DSL ?
i have ${in.body} but i dont know how to access to the exchange.out message

thx
bruno