private static void OnAllowedChildrenTagError( TagHelperBlockTracker tracker, string tagName, Block tagBlock, ErrorSink errorSink) { var allowedChildrenString = string.Join(", ", tracker.AllowedChildren); var errorMessage = LegacyResources.FormatTagHelperParseTreeRewriter_InvalidNestedTag( tagName, tracker.TagName, allowedChildrenString); var errorStart = GetTagDeclarationErrorStart(tagBlock); errorSink.OnError(errorStart, errorMessage, tagName.Length); }