REST testing: DELETE request with BODY / Payload?

The application I have to test the choice has been made for DELETE requests to also add a BODY / payload. It has been noted in the spec file that this might be a problem for 3rd party clients. Indeed, for a browser extension client when I changed the request type to DELETE the BODY was automatically closed, but it nevertheless let me open it again. However in SoapUI as soon as I do this (change the Method to DELETE), the BODY disappears and there seem to be no way I can bring it back. So in SoapUI DELETE requests with bodies are not at all supported? Thanks!