@NotNull
  private static Set<String> parseKeywords(@Nullable PropertyValue keywordsValue) {
    Set<String> result = new HashSet<>();

    if (keywordsValue != null) {
      for (String keyword : StringUtil.split(PropertyValue.toString(keywordsValue), " ")) {
        result.add(ObjectUtils.notNull(KNOWN_KEYWORD_ALIASES.get(keyword), keyword));
      }
    }

    return result;
  }
@NotNull
  private static Set<String> parseKeywords(@Nullable PropertyValue keywordsValue)