def METHOD_NAME(self, package: str, since: datetime) -> List[str]:
    """
    Gets list of nvr for builds of a package since the specified datetime.
    Args:
        package: Package name.
        since: Only builds newer than this datetime will be considered.
    Returns:
        List of NVRs.
    """
    return [b["nvr"] for b in self.get_builds(package, since)]