code: @Deprecated
    public void addInternalServlet(String name, String pathSpec,
        Class<? extends HttpServlet> clazz) {
      ServletHolder holder = new ServletHolder(clazz);
      if (name != null) {
        holder.setName(name);
      }
      webAppContext.addServlet(holder, pathSpec);
    }
docs: Add an internal servlet in the server.
  @param name The name of the servlet (can be passed as null)
  @param pathSpec The path spec for the servlet
  @param clazz The servlet class
  @deprecated this is a temporary method