docs: public void addELResolver(ELResolver resolver)
      {
          // The following concrete methods were added for JSF 1.2.  They supply default 
          // implementations that throw UnsupportedOperationException.  
          // This allows old Application implementations to still work.
          Application application = getMyfacesApplicationInstance();
          if (application != null)
          {
              application.addELResolver(resolver);
              return;
          }
          throw new UnsupportedOperationException();
      }