@abc.abstractmethod<EOL><INDENT>def deleted_descendant_bin(self, bin_id, descendant_id):<DEDENT>
pass<EOL>
The callback for notifications of deleted bin descendants.

        :param bin_id: the ``Id`` of the ``Bin``
        :type bin_id: ``osid.id.Id``
        :param descendant_id: the ``Id`` of the removed ``Bin`` descendant
        :type descendant_id: ``osid.id.Id``


        *compliance: mandatory -- This method must be implemented.*