Identifies exported VLANs in VXLAN gateway configurations.

        Args:
            name (str): overlay_gateway name
            vlan(str):  vlan_id range
            callback (function): A function executed upon completion of the
                 method.

        Returns:
           Return value of `callback`.

        Raises:
            None

def hwvtep_attach_vlan_vid(self, **kwargs):
        """
        Identifies exported VLANs in VXLAN gateway configurations.

        Args:
            name (str): overlay_gateway name
            vlan(str):  vlan_id range
            callback (function): A function executed upon completion of the
                 method.

        Returns:
           Return value of `callback`.

        Raises:
            None
        """
        name = kwargs.pop('name')
        mac = kwargs.pop('mac')
        vlan = kwargs.pop('vlan')
        name_args = dict(name=name, vid=vlan, mac=mac)
        method_name = 'overlay_gateway_attach_vlan_mac'
        method_class = self._brocade_tunnels
        gw_attr = getattr(method_class, method_name)
        config = gw_attr(**name_args)
        output = self._callback(config)
        return output