docs: public static <T extends CcgExample> List<T> filterExampleCollection(
        final CcgParser parser, List<T> examples) {
      MapReduceExecutor executor = MapReduceConfiguration.getMapReduceExecutor();
  
      List<T> filteredExamples = executor.filter(examples, new Predicate<T>() {
        @Override
        public boolean apply(CcgExample example) {
          return isPossibleExample(parser, example);
        }
      });
  
      return filteredExamples;
    }