glibmm 2.56.0

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- iterator : Glib::ArrayHandle< T, Tr > , Glib::ArrayHandle< bool, Container_Helpers::TypeTraits< bool > > , Glib::Dir , Glib::HelperList< T_Child, T_CppElement, T_Iterator > , Glib::ListHandle< T, Tr > , Glib::SListHandle< T, Tr > , Glib::ustring
- iterator_category : Glib::Container_Helpers::ArrayHandleIterator< Tr > , Glib::Container_Helpers::ArrayIterator< Tr > , Glib::Container_Helpers::ListHandleIterator< Tr > , Glib::Container_Helpers::ListIterator< Tr > , Glib::Container_Helpers::SListHandleIterator< Tr > , Glib::Container_Helpers::SListIterator< Tr > , Glib::DirIterator , Glib::ustring_Iterator< T >