'Deletes an existing VLAN
:param      vlan: The VLAN to delete
:type       vlan: :class:`DimensionDataNetworkDomain`
:rtype: ``bool``'

def ex_delete_vlan(self, vlan):

    delete_node = ET.Element('deleteVlan', {'xmlns': TYPES_URN})
    delete_node.set('id', vlan.id)
    result = self.connection.request_with_orgId_api_2('network/deleteVlan', method='POST', data=ET.tostring(delete_node)).object
    response_code = findtext(result, 'responseCode', TYPES_URN)
    return (response_code in ['IN_PROGRESS', 'OK'])
