code: protected boolean isApplicable(AbstractElement<?, ?> result) {
          ResultFilter filter = context.configuration.getResultFilter();
          return filter == null || filter.isApplicable(result);
      }
docs: If the inventory configuration provided a {@link ResultFilter}, this calls it to tell whether provided element
  is applicable. If the result filter is not provided by the configuration, true will always be returned.
  
  @param result the potential result to be checked for applicability in the result set
  @return true or false (!!!)