Can't use the dictionary for an enum class inside a namespace without the rootmap

ROOT
5

In the dictionary source file I see the enum class mentioned only in TriggerDictionaryInitialization_libMyEnumDict_Impl, in this section:

static const char* classesHeaders[]={
"NS::MyEnum", payloadCode, "@",
nullptr};

That string is then used as argument for TROOT::RegisterModule:

TROOT::RegisterModule("libMyEnumDict",
        headers, includePaths, payloadCode, fwdDeclCode,
        TriggerDictionaryInitialization_libMyEnumDict_Impl, {}, classesHeaders, /*has no C++ module*/false);

I can’t understand whether this should make the enum class visible to the interpreter even when not loading the .rootmap or not.