def mark_unread(self) -> MarkUnreadRequestBuilder:
        """
        Provides operations to call the markUnread method.
        """
        from .mark_unread.mark_unread_request_builder import MarkUnreadRequestBuilder

        return MarkUnreadRequestBuilder(self.request_adapter, self.path_parameters)

        Provides operations to call the markUnread method.
        
msgraph/generated/admin/service_announcement/messages/messages_request_builder.py