isLoadingByTag method
Works the same like isLoading, but with a specific tag. Typically used in a screen where there are more than one waitable processes and the user needs to be notified by a separate display.
Implementation
@override
bool isLoadingByTag(String tag,) {
final Rx<bool> isLoading = _extraIsLoadings[tag] ??= false.obs;
return isLoading.value;
}