public override object VisitNamespace_body([NotNull] CSharpParser.Namespace_bodyContext context)
        {
            var isServiceNamespace = GetCurrentNamespace() == _serviceFile.ServiceNamespace;

            if (isServiceNamespace)
            {
                _hasServiceNamespace = true;
            }

            VisitChildren(context);

            if (!_hasServiceInterface && isServiceNamespace)
            {
                var classInterfaceStopIndex = _cSharpParserService.GetClassInterfaceStopIndex(context);

                var preclassWhitespace = Tokens.GetHiddenTokensToLeft(context.Start.TokenIndex, Lexer.Hidden);
                int tabLevels          = 1 + ((preclassWhitespace?.Count ?? 0) > 0 ?
                                              _stringUtilService.CalculateTabLevels(preclassWhitespace[0]?.Text ?? string.Empty, _tabString) : 0);

                var interfaceDeclaration = _cSharpParserService.GenerateClassInterfaceDeclaration(
                    _serviceFile.ServiceDeclaration,
                    tabLevels,
                    _tabString);

                IsModified = true;
                Rewriter.InsertAfter(classInterfaceStopIndex, interfaceDeclaration);
            }

            return(null);
        }