code: public static DeleteRequest checkRequest(final HttpServletRequest request,
  			final DeleteResponse deleteResponse) {
  		final DeleteRequestType type = checkType(request, deleteResponse);
  		if (type != null) {
  			return new DeleteRequest(type);
  		}
  
  		return null;
  	}
docs: check a delete request for validity concerning NSSP
  
  @param request
  Tomcat servlet request
  @param deleteResponse
  delete response object
  @return delete request object<br>
  <b>null</b> if the delete request is invalid