code: def to_api_repr(self):
          
          resource = super(Policy, self).to_api_repr()
  
          if self.etag is not None:
              resource["etag"] = base64.b64encode(self.etag).decode("ascii")
  
          return resource
docs: Render a JSON policy resource.
  
          Overrides the base class version to convert :attr:`etag` from bytes
          to JSON-compatible base64-encoded text.
  
          Returns:
              dict: a JSON resource to be passed to the
              ``setIamPolicy`` REST API.