code: def make_public(self, client=None):
          
          self.acl.all().grant_read()
          self.acl.save(client=client)
docs: Update blob's ACL, granting read access to anonymous users.
  
          :type client: :class:`~google.cloud.storage.client.Client` or
                        ``NoneType``
          :param client: Optional. The client to use.  If not passed, falls back
                         to the ``client`` stored on the blob's bucket.