def METHOD_NAME(self, endpoint, view_args):
    model_name = view_args.pop("Model", None)
    group = view_args.pop("group", _MARKER)
    if group == "_":
        # "General" group
        group = ""
    if group is not _MARKER:
        view_args["group"] = group
    if model_name is not None:
        svc = get_service("vocabularies")
        Model = svc.get_vocabulary(name=model_name, group=group)
        g.breadcrumb.append(
            BreadcrumbItem(
                label=Model.Meta.group if group else _("Global"),
                url=url_for(".vocabularies_group", group=group or "_"),
            )
        )
        g.breadcrumb.append(
            BreadcrumbItem(
                label=Model.Meta.label,
                url=url_for(
                    ".vocabularies_model", group=group or "_", Model=Model.Meta.name
                ),
            )
        )
        view_args["Model"] = Model