def urlcrawlstatus(self):
   if self.urlcrawlstatus_ is None:
     self.lazy_init_lock_.acquire()
     try:
       if self.urlcrawlstatus_ is None: self.urlcrawlstatus_ = URLCrawlStatusTag()
     finally:
       self.lazy_init_lock_.release()
   return self.urlcrawlstatus_