private static int convertToMask(final WordOccurrence.Kind kind) {
        if (kind == null) {
          return UsageSearchContext.ANY;
        }
        if (kind == WordOccurrence.Kind.CODE) return UsageSearchContext.IN_CODE;
        if (kind == WordOccurrence.Kind.COMMENTS) return UsageSearchContext.IN_COMMENTS;
        if (kind == WordOccurrence.Kind.LITERALS) return UsageSearchContext.IN_STRINGS;
        if (kind == WordOccurrence.Kind.FOREIGN_LANGUAGE) return UsageSearchContext.IN_FOREIGN_LANGUAGES;
        return 0;
      }
private static int convertToMask(final WordOccurrence.Kind kind)