docs: def has_sample(self, md5):
          """Checks if data store has this sample.
  
          Args:
              md5: The md5 digest of the required sample.
  
          Returns:
              True if sample with this md5 is present, else False.
          """
  
          # The easiest thing is to simply get the sample and if that
          # succeeds than return True, else return False
          sample = self.get_sample(md5)
          return True if sample else False