def METHOD_NAME(self, repo_name: RepoName, repo_reference: str) -> bool:
    r = httpx.head(
        f"{self.data.url}/v2/{repo_name}/manifests/{repo_reference}",
        auth=self.data.auth,
    )
    if r.status_code == 400:
        return False
    # some other error?
    r.raise_for_status()
    return True