def post(method, hmc, uri, uri_parms, body, logon_required,
             wait_for_completion):
        """Operation: Update <resource> Properties."""
        assert wait_for_completion is True  # async not supported yet
        try:
            resource = hmc.lookup_by_uri(uri)
        except KeyError:
            raise InvalidResourceError(method, uri)
        resource.update(body)