class Aws::Rest::Request::Body

def apply(http_req, params)
  body = build_body(params)
  # for rest-json, ensure we send at least an empty object
  # don't send an empty object for streaming? case.
  if body.nil? && @serializer_class == Json::Builder &&
     modeled_body? && !streaming?
    body = '{}'
  end
  http_req.body = body
end