@Nullable
      private static ProblemHighlightType getCustomHighlightType(@NotNull MessageFormatUtil.MessageFormatErrorType type) {
        if (type.getSeverity() == MessageFormatUtil.ErrorSeverity.WARNING ||
            type.getSeverity() == MessageFormatUtil.ErrorSeverity.WEAK_WARNING) {
          return ProblemHighlightType.WEAK_WARNING;
        }
        return null;
      }
@Nullable
      private static ProblemHighlightType getCustomHighlightType(@NotNull MessageFormatUtil.MessageFormatErrorType type)