code: @Override
      public MatchResult matches(List<String> lines) {
          MatchResult result = NO_MATCH;
          for (int i = 0; i < lines.size(); i++) {
              String line = lines.get(i);
              if (line.contains("<PC-Substance") && result == NO_MATCH) result = new MatchResult(true, this, i);
              if (line.contains("<PC-Substances")) return NO_MATCH;
          }
          return result;
      }
docs: {@inheritDoc}