code: def get_arbiter_broks(self):
          
          with self.arbiter_broks_lock:
              statsmgr.gauge('get-new-broks-count.arbiter', len(self.arbiter_broks))
              # Add the broks to our global list
              self.external_broks.extend(self.arbiter_broks)
              self.arbiter_broks = []
docs: Get the broks from the arbiters,
          but as the arbiter_broks list can be push by arbiter without Global lock,
          we must protect this with a lock
  
          TODO: really? check this arbiter behavior!
  
          :return: None