def METHOD_NAME(self):
    sstables = self.get_sstables()
    tombstones_num = 0
    for sstable in sstables:
        tombstones_num += self.count_sstable_tombstones(sstable=sstable)
    self.log.debug('Got %s tombstones for %s', tombstones_num, self.ks_cf)
    return tombstones_num