docs: public List<Match> getKeyMatches(KEY id) {
          Set<String> keyColumn = orMapping.getKeyColumn();
          List<Match> matches = new ArrayList<Match>(keyColumn.size());
          for (String column : keyColumn) {
              Object value = getKeyColumnValue(column, id);
              matches.add(new Match(column, value));
          }
          return matches;
      }