code: public static boolean isMultipartContent (@Nonnull final HttpServletRequest aHttpRequest)
    {
      if (getHttpMethod (aHttpRequest) != EHttpMethod.POST)
        return false;
  
      return isMultipartContent (aHttpRequest.getContentType ());
    }
docs: Utility method that determines whether the request contains multipart
  content.
  
  @param aHttpRequest
  The servlet request to be evaluated. Must be non-null.
  @return <code>true</code> if the request is multipart; <code>false</code>
  otherwise.