code: private boolean isPayloadIndirectOrDirect(final HttpServletRequest request) {
          return Collections.list(request.getHeaders("Link")).stream().map(Link::valueOf).map(Link::getUri)
                  .anyMatch(l -> directOrIndirect.contains(l));
      }
docs: Is the request to create an indirect or direct container.
  
  @param request The current request
  @return whether we are acting on/creating an indirect/direct container.