def add(self, elem, replace=False):
        """Add a requirement.

        :param elem: a string or :class:`Requirement` instance.
        :param replace: if `True`, packages in the set with the same name will
            be removed first.
        """
        if isinstance(elem, text_type):
            elem = Requirement.coerce(elem)
        if replace and elem in self:
            self.remove(elem)
        super(Requirements, self).add(elem)
def create_on_device(self):
        resource = self.client.api.cm.shared.licensing.pools_s.pool.create(
            name=self.want.name,
            baseRegKey=self.want.base_key,
            method="AUTOMATIC"
        )
        return self._wait_for_license_pool_state_to_activate(resource)