code: protected boolean shouldRegisterJspServlet() {
  		return this.jsp != null && this.jsp.getRegistered() && ClassUtils
  				.isPresent(this.jsp.getClassName(), getClass().getClassLoader());
  	}
docs: Returns whether or not the JSP servlet should be registered with the web server.
  @return {@code true} if the servlet should be registered, otherwise {@code false}