Why HttpServletRequest object does not have getServletConfig() method?

Question

I am new to Java Servlets and while going through one tutorial I found this.

ServletContext context = getServletContext();

When I tried using the request object to get the ServletContext object it also worked.

ServletContext context = request.getServletContext();

But I could not find a method in the HttpServletRequest class to get ServletConfig.

ServletConfig config = request.getServletConfig();

This is not correct as HttpServletRequest class does not have getServletCofig() method.

Why is it so? I know that ServletConfig is acts as a local to a servlet while ServletContext acts as a global to all the servlets in the application. Is it related to this any how?

Thank you for your help.