code: public void afterPropertiesSet() throws Exception {
          // Ensure that all post-processors requested are registered
          String[] actions = StringUtils.commaDelimitedListToStringArray( getPostProcessorActionsToRun() );
          for( int i = 0; i < actions.length; i++ ) {
              if( !postProcessorActionIds.contains( actions[i] ) ) {
                  throw new IllegalArgumentException( "Requested post-processor action '" + actions[i]
                          + "' is not registered." );
              }
          }
      }
docs: Validate our configuration.
  @throws Exception