code: public final ImmutableSetMultitable<R, C, V> loadToSetMultitable(CharSource source)
        throws IOException {
      final ImmutableSetMultitable.Builder<R, C, V> ret =
          ImmutableSetMultitable.builder();
  
      loadToMultitable(source, ret);
  
      return ret.build();
    }
docs: Loads a {@link com.bbn.bue.common.collections.SetMultitable} from the specified source
  according to the configuration of this loader.