def remove(self, elem):
        """Remove a requirement.

        :param elem: a string or :class:`Requirement` instance.
        """
        if isinstance(elem, text_type):
            for requirement in self:
                if requirement.package == elem:
                    return super(Requirements, self).remove(requirement)
        return super(Requirements, self).remove(elem)
def unbound_on_Connection(server, user,
                                  password,
                                  auto_bind,
                                  client_strategy,
                                  authentication,
                                  check_names,
                                  auto_referrals, *a, **kwargs):
            return self._on_Connection(server, user,
                                       password,
                                       auto_bind,
                                       client_strategy,
                                       authentication,
                                       check_names,
                                       auto_referrals, *a,
                                       **kwargs)