public @NotNull HighlightDisplayLevel getDefaultLevel() {
    if (level == null) {
      return HighlightDisplayLevel.WARNING;
    }
    HighlightDisplayLevel displayLevel = HighlightDisplayLevel.find(level);
    if (displayLevel == null) {
      LOG.error(new PluginException("Can't find highlight display level: " + level + "; registered for: " + implementationClass + "; " +
                                    "and short name: " + shortName, getPluginDescriptor().getPluginId()));
      return HighlightDisplayLevel.WARNING;
    }
    return displayLevel;
  }
public @NotNull HighlightDisplayLevel getDefaultLevel()