code: public static URL forWebInfClasses(final ServletContext servletContext) {
          try {
              final String path = servletContext.getRealPath("/WEB-INF/classes");
              if (path != null) {
                  final File file = new File(path);
                  if (file.exists())
                      return file.toURL();
              } else {
                  return servletContext.getResource("/WEB-INF/classes");
              }
          } catch (MalformedURLException e) { /*fuck off*/ }
          return null;
      }
docs: Returns the URL of the {@code WEB-INF/classes} folder.
  <p>
  This finds the URLs using the {@link ServletContext}.
  
  @return the collection of URLs, not null