code: public static void loadActionForm(JspContext jspContext, Object form) {
          jspContext.setAttribute(ACTION_FORM_IMPLICIT_OBJECT_KEY, unwrapForm(form));
      }
docs: Load the given <code>form</code> into the {@link JspContext} object.  Because the
  framework supports any bean action forms, the type of the form is {@link Object}
  @param jspContext the jsp context
  @param form the form object