code: def check_cache(self, vts, counter):
      
      if not self.artifact_cache_reads_enabled():
        return False
      cached_vts, _, _ = self.check_artifact_cache([vts])
      if not cached_vts:
        self.context.log.debug('Missed cache during double check for {}'
          .format(vts.target.address.spec))
        return False
      assert cached_vts == [vts], (
        'Cache returned unexpected target: {} vs {}'.format(cached_vts, [vts])
      )
      self.context.log.info('Hit cache during double check for {}'.format(vts.target.address.spec))
      counter()
      return True
docs: Manually checks the artifact cache (usually immediately before compilation.)
  
      Returns true if the cache was hit successfully, indicating that no compilation is necessary.