protected virtual void AppendModule(TsModule module, ScriptBuilder sb, TsGeneratorOutput generatorOutput)
        {
            var classes = module.Classes.Where(c => !_typeConvertors.IsConvertorRegistered(c.Type) && !c.IsIgnored).OrderBy(c => GetTypeName(c)).ToList();
            var enums   = module.Enums.Where(e => !_typeConvertors.IsConvertorRegistered(e.Type) && !e.IsIgnored).OrderBy(e => GetTypeName(e)).ToList();

            if ((generatorOutput == TsGeneratorOutput.Enums && enums.Count == 0) ||
                (generatorOutput == TsGeneratorOutput.Properties && classes.Count == 0) ||
                (enums.Count == 0 && classes.Count == 0))
            {
                return;
            }

            if (generatorOutput == TsGeneratorOutput.Properties && !classes.Any(c => c.Fields.Any() || c.Properties.Any()))
            {
                return;
            }

            if (generatorOutput == TsGeneratorOutput.Constants && !classes.Any(c => c.Constants.Any()))
            {
                return;
            }

            var moduleName           = GetModuleName(module);
            var generateModuleHeader = moduleName != string.Empty;

            if (generateModuleHeader)
            {
                if (generatorOutput != TsGeneratorOutput.Enums &&
                    (generatorOutput & TsGeneratorOutput.Constants) != TsGeneratorOutput.Constants)
                {
                    sb.Append("declare ");
                }

                sb.AppendLine(string.Format("namespace {0} {{", moduleName));
            }

            using (sb.IncreaseIndentation()) {
                if ((generatorOutput & TsGeneratorOutput.Enums) == TsGeneratorOutput.Enums)
                {
                    foreach (var enumModel in enums)
                    {
                        this.AppendEnumDefinition(enumModel, sb, generatorOutput);
                    }
                }

                if (((generatorOutput & TsGeneratorOutput.Properties) == TsGeneratorOutput.Properties) ||
                    (generatorOutput & TsGeneratorOutput.Fields) == TsGeneratorOutput.Fields)
                {
                    foreach (var classModel in classes)
                    {
                        this.AppendClassDefinition(classModel, sb, generatorOutput);
                    }
                }

                if ((generatorOutput & TsGeneratorOutput.Constants) == TsGeneratorOutput.Constants)
                {
                    foreach (var classModel in classes)
                    {
                        if (classModel.IsIgnored)
                        {
                            continue;
                        }

                        this.AppendConstantModule(classModel, sb);
                    }
                }
            }
            if (generateModuleHeader)
            {
                sb.AppendLine("}");
            }
        }