protected @Nullable String getName(@NotNull XmlTag xml) {
      String shortName = xml.getAttributeValue("shortName");
      if (shortName == null) {
        String implementationClass = xml.getAttributeValue("implementationClass");
        if (implementationClass == null) {
          return null;
        }
        shortName = getShortName(StringUtil.getShortName(implementationClass));
      }
      return shortName;
    }
protected @Nullable String getName(@NotNull XmlTag xml)