private void highlightPropertyKey(@NotNull PsiElement element, @NotNull AnnotationHolder holder) {
    if (JsonPsiUtil.isPropertyKey(element)) {
      if (isDebug) {
        holder.newAnnotation(HighlightSeverity.INFORMATION, JsonBundle.message("annotation.property.key")).textAttributes(JsonSyntaxHighlighterFactory.JSON_PROPERTY_KEY).create();
      }
      else {
        holder.newSilentAnnotation(HighlightSeverity.INFORMATION).textAttributes(JsonSyntaxHighlighterFactory.JSON_PROPERTY_KEY).create();
      }
    }
  }
private void highlightPropertyKey(@NotNull PsiElement element, @NotNull AnnotationHolder holder)