def METHOD_NAME(self) -> Optional[xen_hypervisor_type]:
    """
    Lookup xen hypervisor and provide filename and hypervisor name
    :return: tuple with filename and hypervisor name
    :rtype: tuple|None
    """
    xen_hypervisor = self.root_dir + '/boot/xen.gz'
    if os.path.exists(xen_hypervisor):
        return xen_hypervisor_type(
            filename=xen_hypervisor,
            name='xen.gz'
        )
    return None