@Override
      public void visitAntDomCustomElement(AntDomCustomElement custom) {
        if (custom.getDefinitionClass() == null) {
          final AntDomNamedElement declaringElement = custom.getDeclaringElement();
          if (declaringElement instanceof AntDomTypeDef) {
            String failedMessage = AntBundle.message("using.definition.which.type.failed.to.load");
            final String error = custom.getLoadError();
            if (error != null) {
              failedMessage = failedMessage + ": " + error;
            }
            createAnnotationOnTag(custom, failedMessage, holder);
          }
        }
        super.visitAntDomCustomElement(custom);
      }
@Override
      public void visitAntDomCustomElement(AntDomCustomElement custom)